LINKSYS WRVS4400N Wireless-N Gigabit Security Router with VPN User Manual Book

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USER GUIDE
Wireless-N Gigabit Security
Router with VPN
with
Ports
4-portuter
Model No. WRVS4400N
Wireless
ModelModel
No. No.
BUSINESS SERIES
Wireless-N Gigabit Security Router with VPN
Copyright and Trademarks
Specifications are subject to change without notice. Linksys is a registered trademark or trademark of Cisco
Systems, Inc. and/or its affiliates in the U.S. and certain other countries. Copyright © 2006 Cisco Systems, Inc. All
rights reserved. Other brands and product names are trademarks or registered trademarks of their respective
holders.
WARNING: This product contains chemicals, including lead, known
to the State of California to cause cancer, and birth defects or other
reproductive harm. Wash hands after handling.
How to Use this Guide
This User Guide has been designed to make understanding networking with the Router easier than ever. Look for
the following items when reading this Guide:
This checkmark means there is a note of interest and
is something you should pay special attention to while
using the Router.
This exclamation point means there is a caution or
warning and is something that could damage your
property or the Router.
This question mark provides you with a reminder about
something you might need to do while using the Router.
In addition to these symbols, there are definitions for technical terms that are presented like this:
word: definition.
Also, each figure (diagram, screenshot, or other image) is provided with a figure number and description, like
this:
Figure 0-1: Sample Figure Description
Figure numbers and descriptions can also be found in the “List of Figures” section in the “Table of Contents”.
WRVS4400N-UG-50426NC RR
Wireless-N Gigabit Security Router with VPN
Table of Contents
Chapter 1: Introduction
Welcome
What’s in this Guide?
Chapter 2: Networking and Security Basics
An Introduction to LANs
The Use of IP Addresses
The Intrusion Prevention System (IPS)
Chapter 3: Planning Your Virtual Private Network (VPN)
Why do I need a VPN?
What is a VPN?
Chapter 4: Getting to Know the Router
The Front Panel
The Back Panels
Antennas and Positions
Chapter 5: Connecting the Router
Overview
Connection Instructions
Placement Options
Chapter 6: Setting Up and Configuring the Router
Overview
Basic Setup
How to Access the Web-based Utility
How to Navigate the Utility
Setup Tab
Wireless Tab
Firewall Tab
VPN Tab
QoS Tab
Administration Tab
IPS Tab
L2 Switch Tab
Status Tab
Appendix A: Troubleshooting
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Wireless-N Gigabit Security Router with VPN
Common Problems and Solutions
Frequently Asked Questions
Appendix B: Using the Linksys QuickVPN Software for Windows 2000 or XP
Overview
Before You Begin
Installing the Linksys QuickVPN Software
Using the Linksys QuickVPN Software
Appendix C: Configuring a Gateway-to-Gateway IPSec Tunnel
Overview
Before You Begin
Configuring the VPN Settings for the VPN Routers
Configuring the Key Management Settings
Configuring PC 1 and PC 2
Appendix D: Finding the MAC Address and IP Address for
Your Ethernet Adapter
Windows 98 or Me Instructions
Windows 2000 or XP Instructions
For the Router’s Web-based Utility
Appendix E: Glossary
Appendix F: Specifications
Appendix G: Warranty Information
Appendix H: Regulatory Information
Appendix I: Contact Information
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Wireless-N Gigabit Security Router with VPN
List of Figures
Figure 2-1: Example network
Figure 2-2: IPS Scenarios
Figure 3-1: VPN Router to VPN Router
Figure 3-2: Computer to VPN Router
Figure 4-1: Front Panel
Figure 4-2: Back Panel
Figure 4-3: Stackable Position and its Antenna Setup
Figure 4-4: Standalone Position and its Antenna Setup
Figure 5-1: Example of a Typical Network
Figure 5-2: Connect a PC
Figure 5-3: Connect the Internet
Figure 5-4: Connect the Power
Figure 5-5: The Stand Option
Figure 5-6: Stand
Figure 5-7: Mounting Dimensions
Figure 5-8: Wall Mounting Hardware
Figure 6-1: Router’s IP Address
Figure 6-2: Login Screen for Web-based Utility
Figure 6-1: Setup - IP Versions
Figure 6-2: Setup - WAN (DHCP)
Figure 6-3: Setup - WAN (Static IP)
Figure 6-4: Setup - WAN (PPPoE)
Figure 6-5: Setup - WAN (PPTP)
Figure 6-6: Setup - WAN (Heart Beat Signal)
Figure 6-7: Setup - WAN (L2TP)
Figure 6-8: Setup - WAN (Optional Settings)
Figure 6-9: Setup - WAN (DynDNS.org)
Figure 6-10: Setup - WAN (TZO.com)
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Wireless-N Gigabit Security Router with VPN
Figure 6-11: Setup - LAN
Figure 6-12: Setup - DMZ
Figure 6-13: Setup - MAC Address Clone
Figure 6-14: Setup - Advanced Routing
Figure 6-15: Setup - Advanced Routing (Routing Table)
Figure 6-16: Setup - Time
Figure 6-17: Wireless - Basic Wireless Settings
Figure 6-18: Wireless - Wireless Security (Disabled)
Figure 6-19: Wireless - Wireless Security (WPA-Personal)
Figure 6-20: Wireless - Wireless Security (WPA2-Personal)
Figure 6-21: Wireless - Wireless Security (WPA2-Personal Mixed)
Figure 6-22: Wireless - Wireless Security (WPA-Enterprise)
Figure 6-23: Wireless - Wireless Security (WPA2-Enterprise)
Figure 6-24: Wireless - Wireless Security (WPA2-Enterprise Mixed)
Figure 6-25: Wireless - Wireless Security (WEP)
Figure 6-26: Wireless - Wireless Connection Control
Figure 6-27: Select MAC Address from Wireless Client List
Figure 6-28: Wireless - Advanced Wireless Settings
Figure 6-29: Firewall - Basic Settings
Figure 6-30: Firewall - IP Based ACL
Figure 6-31: Firewall - IP Based ACL (pre-defined services)
Figure 6-32: Firewall - IP Based ACL (Service definition)
Figure 6-33: Firewall - Edit IP ACL Rule
Figure 6-34: Firewall - Internet Access Policy
Figure 6-35: Firewall - Internet Access Policy Summary
Figure 6-36: Firewall - Internet Access Policy (List of PCs to apply policy)
Figure 6-37: Firewall - Single Port Forwarding
Figure 6-38: Port Range Forwarding
Figure 6-39: Port Range Triggering
Figure 6-40: Firewall - Services
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Wireless-N Gigabit Security Router with VPN
Figure 6-41: VPN - IPsec VPN
Figure 6-42: VPN Tunnel Summary
Figure 6-43: View VPN Tunnel Log
Figure 6-44: IPsec VPN Advanced Settings
Figure 6-45: VPN - VPN Client Accounts
Figure 6-46: VPN - VPN Passthrough
Figure 6-47: QoS - Application Based
Figure 6-48: Port-based
Figure 6-49: Administration - Management
Figure 6-50: Administration - Log
Figure 6-51: View Log pop-up window
Figure 6-52: Administration - Diagnostics
Figure 6-53: Ping Test Screen
Figure 6-54: Trace Route Test Screen
Figure 6-55: Administration - Config Management
Figure 6-56: Administration - Factory Default
Figure 6-57: Administration - Reboot
Figure 6-58: Administration - Firmware Upgrade
Figure 6-59: IPS - Configuration
Figure 6-60: IPS - P2P / IM
Figure 6-61: IPS - Report
Figure 6-62: IPS Log Raw Data
Figure 6-63: IPS - Information
Figure 6-64: L2 Switch - VLAN
Figure 6-65: L2 Switch - RADIUS
Figure 6-66: L2 Switch - RADIUS
Figure 6-67: L2 Switch - Port Settings
Figure 6-68: L2 Switch - Cable Diagnostics
Figure 6-69: Status - WAN / Gateway
Figure 6-70: Status - LAN
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Wireless-N Gigabit Security Router with VPN
Figure 6-71: LAN DHCP Client Table
Figure 6-72: LAN ARP Table
Figure 6-73: Status - Wireless LAN
Figure 6-74: Status - System Performance
Figure 6-75: Status - VPN Clients
Figure 6-76: Status - IPsec VPN
Figure B-1: VPN Client Accounts Screen
Figure B-2: QuickVPN Desktop Icon
Figure B-3: QuickVPN Tray Icon - No Connection
Figure B-4: QuickVPN Software - Profile
Figure B-5: Connecting
Figure B-6: Activating Policy
Figure B-7: Verifying Network
Figure B-8: QuickVPN Software - Status
Figure B-9: QuickVPN Tray Icon - Connection
Figure B-10: QuickVPN Tray Icon - No Connection
Figure B-11: QuickVPN Software - Change Password
Figure C-1: Diagram of Gateway-to-Gateway VPN Tunnel
Figure C-2: Login Screen
Figure C-3: VPN - IPsec VPN Configuration
Figure C-4: Advanced IPsec VPN Tunnel Settings
Figure C-5: Auto (IKE) Advanced Settings Screen
Figure D-1: IP Configuration Screen
Figure D-2: MAC Address/Adapter Address
Figure D-3: MAC Address/Physical Address
Figure D-4: MAC Address Clone
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Wireless-N Gigabit Security Router with VPN
Chapter 1: Introduction
Welcome
Thank you for choosing the Wireless-N Gigabit Security Router with VPN. The Wireless-N Gigabit Security Router
with VPN is an advanced Internet-sharing network solution for your small business needs. The Router features a
built-in 4-Port full-duplex 10/100/1000 Ethernet switch to connect four PCs directly, or you can connect more
hubs and switches to create as big a network as you need. Like any wireless router, it lets multiple computers in
your office share an Internet connection through both wired and wireless connections. It can also be used as an
intranet router to aggregate traffic to a company backbone network.
The Router has a built-in access point that supports the latest 802.11n draft specification by IEEE. It also supports
802.11g and 802.11b clients in a mixed environment. The access point can support an 11n data rate of up to 300
Mbps. Besides having a higher data rate, 802.11n technology also promises longer coverage by using multiple
antennas to transmit and receive data streams in different directions. Users are encouraged to upgrade their
firmware through www.linksys.com when 802.11n specification is finalized by IEEE to ensure compatibility with
all the wireless-N devices.
Ethernet: a network protocol that specifies
how data is placed on and retrieved from a
common transmission medium.
The Wireless-N Gigabit Security Router with VPN is equipped with advanced security technologies like Intrusion
Prevention System (IPS), Stateful Packet Inspection (SPI) Firewall, IP based Access List (IP ACL), and Network
Address Port Translation (NAPT, also called NAT as a more generic term). These technologies work together by
providing self-defensive strategy. Malicious attack traffic is identified, classified, and stopped in real time while
passing through the Router. Users are encouraged to update their IPS signature file to stay current on stopping
malicious worms. The SPI Firewall provides deep packet inspection to analyze packets in network layer (IP) and
transport layer (TCP, UDP) to block illegal packet transactions. Users can also use IP based ACL to limit traffic to a
specific source, destination and protocol. NAPT allows users to open specific TCP/UDP port numbers to the
Internet to provide limited service while minimizing harmful traffic at the same time.
The Virtual Private Network (VPN) capability is another security feature that creates encrypted “tunnels” through
the Internet, allowing up to five remote offices and five traveling users to securely connect into your office
network from off-site. Users connecting through a VPN tunnel are attached to your company's network with
secure access to files, e-mail, and your intranet as if they were in the building. You can also use the VPN
capability to allow users on your small office network to securely connect out to a corporate network. The QoS
features provide consistent voice and video quality throughout your business.
This user guide will give you all the information you need to connect, set up, and configure your Router.
Chapter 1: Introduction
Welcome
Wireless-N Gigabit Security Router with VPN
What’s in this Guide?
This user guide covers the steps for setting up and using the Wireless-N Gigabit Security Router with VPN.
• Chapter 1: Introduction
This chapter describes the Wireless-N Gigabit Security Router with VPN applications and this User Guide.
• Chapter 2: Networking and Security Basics
This chapter describes the basics of networking and network security.
• Chapter 3: Planning Your Virtual Private Network (VPN)
This chapter describes a VPN and its various applications.
• Chapter 4: Getting to Know the Router
This chapter describes the physical features of the Router.
• Chapter 5: Connecting the Router
This chapter instructs you on how to connect the Router to your network.
• Chapter 6: Setting Up and Configuring the Router
This chapter explains how to use the Web-Based Utility to perform basic setup and configure its advanced
settings.
• Appendix A: Troubleshooting
This appendix describes some problems and solutions, as well as frequently asked questions, regarding
installation and use of the Wireless-N Gigabit Security Router with VPN.
• Appendix B: Using the Linksys QuickVPN Software for Windows 2000 or XP
This appendix instructs you on how to use the Linksys QuickVPN software if you are using a Windows 2000 or
XP PC.
• Appendix C: Configuring a Gateway-to-Gateway IPSec Tunnel
This appendix describes how to configure an IPSec VPN Tunnel between two VPN Routers.
• Appendix D: Finding the MAC Address and IP Address for your Ethernet Adapter.
This appendix describes how to find the MAC address for your computer’s Ethernet adapter so you can use
the MAC filtering and/or MAC address cloning feature of the Router. It also explains how to find the IP address
for your computer.
• Appendix E: Glossary
This appendix gives a brief glossary of terms frequently used in networking.
Chapter 1: Introduction
What’s in this Guide?
Wireless-N Gigabit Security Router with VPN
• Appendix F: Specifications
This appendix provides the technical specifications for the Router.
• Appendix G: Warranty Information
This appendix supplies the warranty information for the Router.
• Appendix H: Regulatory Information
This appendix supplies the regulatory information regarding the Router.
• Appendix I: Contact Information
This appendix provides contact information for a variety of Linksys resources, including Technical Support.
Chapter 1: Introduction
What’s in this Guide?
Wireless-N Gigabit Security Router with VPN
Chapter 2: Networking and Security Basics
An Introduction to LANs
A Router is a network device that connects multiple networks together and forward traffic based on IP destination
of each packet.
The Wireless-N Gigabit Security Router can connect your local area network (LAN) or a group of PCs
interconnected in your home or office to the Internet. You can use one public IP address from the ISP through
WAN port and use the router’s Network Address Translation (NAT) technology to share this single IP address
among all the users.
The Router’s Network Address Port Translation (NAPT or NAT) technology protects your network of PCs so users
on the Internet cannot “see” your PCs. This is how your LAN remains private. The Router protects your network by
inspecting the first packet coming in through the Internet port before delivery to the final destination on one of
the Ethernet ports. The Router inspects Internet port services like the web server, ftp server, or other Internet
applications, and, if allowed, it will forward the packet to the appropriate PC on the LAN side.
NAT (Network Address Translation):
NAT technology translates IP
addresses of a local area network to a
different IP address for the Internet.
LAN: the computers and networking products that
make up your local network
Multiple Wireless-N Gigabit Security Routers can also be used to connect multiple LANs together. This usually
applies to a medium-sized or larger company where you want to divide your network into multiple IP subnets to
increase the intranet throughput and reduce the size of the IP broadcast domain and its interference. In this case,
you need one WRVS4400N for each subnetwork and you can connect all the WAN ports to a second level Router
or switch to the Internet. Note that the second level Router only forwards data packets through a wired network
so you don’t have to use the Wireless-N Gigabit Security Router. You can use any wired router in the Linksys
family, e.g. RVS4000, which has 4 LAN ports and 1 WAN port.
The following diagram shows an example that consists of two levels of routers and multiple LANs inter-connected
together. The wireless network is only available at the first level of router to provide end user connections. The
second level router can connect to dedicated Server PCs or routers that aggregates traffic from different LANs.
Chapter 2: Networking and Security Basics
An Introduction to LANs
Wireless-N Gigabit Security Router with VPN
Figure 2-1: Example network
The Use of IP Addresses
IP stands for Internet Protocol. Every device in an IP-based network, including PCs, print servers, and routers,
requires an IP address to identify its location, or address, on the network. This applies to both the Internet and
LAN connections.
There are two ways of assigning IP addresses to your network devices.
Chapter 2: Networking and Security Basics
The Use of IP Addresses
NOTE: Since the Router is a device that connects two
networks, it needs two IP addresses—one for the LAN,
and one for the Internet. In this User Guide, you’ll see
references to the “Internet IP address” and the “LAN
IP address.”
Since the Router uses NAT technology, the only IP
address that can be seen from the Internet for your
network is the Router’s Internet IP address. However,
even this Internet IP address can be hidden on the
Internet by suppressing PING response.
Wireless-N Gigabit Security Router with VPN
A static IP address is a fixed IP address that you assign manually to a PC or other device on the network. Since a
static IP address remains valid until you disable it, static IP addressing ensures that the device assigned it will
always have that same IP address until you change it. Static IP addresses are commonly used with dedicated
network devices such as server PCs or print servers. Since a user’s PC is moving around in a network and is
being powered on or off, it does not require a dedicated IP address that could be a precious resource in your
network.
If you use the Router to share your cable or DSL Internet connection, contact your ISP to find out if they have
assigned a static IP address to your account. If so, you will need that static IP address when configuring the
Router. You can get the information from your ISP.
A dynamic IP address is automatically assigned to a device on the network. This IP address is called dynamic
because it is only temporarily assigned to the PC or other device. After a certain time period, it expires and may
change. If a PC logs onto the network (or the Internet) and its dynamic IP address has expired, the DHCP server
will assign it a new dynamic IP address. Most ISPs use dynamic IP addresses for their customers. By default, the
Router’s Internet Connection Type is Obtain an IP automatically (DHCP).
For DSL users, many ISPs may require you to log on with a user name and password to gain access to the
Internet. This is a dedicated, high-speed connection type called Point-to-Point Protocol over Ethernet (PPPoE).
PPPoE is similar to a dial-up connection, which establishes a PPP session with an ISP server through the DSL
connection. The server will also provide the Router with a dynamic IP address to establish a connection to the
Internet.
A DHCP server can either be located on a designated PC on the network or another network device, such as the
Router. The PC or network device obtaining an IP address is called the DHCP client. DHCP frees you from having to
assign IP addresses manually every time a new user is added to your network. For this Wireless-N Router, a DHCP
client is running on a WAN port for most configurations. A DHCP server is running on the LAN side to provide
services.
By default, a DHCP server is enabled on the Router. If you already have a DHCP server running on your network,
you MUST disable one of the two DHCP servers. If you run more than one DHCP server on your network, you will
experience network errors, such as conflicting IP addresses. To disable DHCP on the Router, refer to the Basic
Setup section in “Chapter 6: Setting Up and Configuring the Router.”
Static IP address: a fixed address
assigned to a computer or device that
is connected to a network.
Dynamic IP address: a temporary IP
address assigned by a DHCP server.
DHCP (Dynamic Host Configuration
Protocol): a protocol that lets one
device on a local network, known as a
DHCP server, assign temporary IP
addresses to the other network
devices, typically computers.
Chapter 2: Networking and Security Basics
The Use of IP Addresses
Wireless-N Gigabit Security Router with VPN
The Intrusion Prevention System (IPS)
1000+
Figure 2-2: IPS Scenarios
IPS is an advanced technology to protect your network from malicious attacks. IPS works together with your SPI
Firewall, IP Based Access List (IP ACL), Network Address Port Translation (NAPT), and Virtual Private Network
(VPN) to achieve the highest amount of securities.
IPS works by providing real-time detection and prevention as an in-line module in a router. The Wireless-N
Security Router has hardware-based acceleration for real-time pattern matching for malicious attacks. It actively
filters and drops malicious TCP/UDP/ICMP/IGMP packets and can reset TCP connections. This protects your client
PCs and servers running various operating systems including Windows, Linux, and Solaris from network worm
attacks. However, this system does not prevent viruses attached emails.
Chapter 2: Networking and Security Basics
The Intrusion Prevention System (IPS)
Wireless-N Gigabit Security Router with VPN
The P2P (peer to peer) and IM (instant messaging) control allows the system administrator to prevent network
users from using those protocols to communicate with people over the Internet. This helps the administrators to
set up company policies on how to use their Internet bandwidth wisely.
The signature file is the heart of the IPS system. It is similar to the Virus definition files on your PC’s Anti-Virus
programs. IPS uses this file to match against packets coming in to the Router and performs actions accordingly.
As of today, the Wireless-N Router is shipped with signature file version 1.1.4 and with a total of 1048 rules. The
rules cover the following categories: DDoS, Buffer Overflow, Access Control, Scan, Trojan Horse, Misc., P2P, IM,
Virus, Worm, and Web Attacks.
Customers are encouraged to update their IPS signature file regularly to prevent any new type of attacks on the
Internet.
Chapter 2: Networking and Security Basics
The Intrusion Prevention System (IPS)
Wireless-N Gigabit Security Router with VPN
Chapter 3: Planning Your Virtual Private Network (VPN)
Why do I need a VPN?
Computer networking provides a flexibility not available when using an archaic, paper-based system. With this
flexibility, however, comes an increased risk in security. This is why firewalls were first introduced. Firewalls help
to protect data inside of a local network. But what do you do once information is sent outside of your local
network, when e-mails are sent to their destination, or when you have to connect to your company's network
when you are out on the road? How is your data protected?
vpn (virtual private network): a security
measure to protect data as it leaves one
network and goes to another over the Internet
That is when a VPN can help. VPNs are called Virtual Private Networks because they secure data moving outside
of your network as if it were still within that network.
When data is sent out across the Internet from your computer, it is always open to attacks. You may already have
a firewall, which will help protect data moving around or held within your network from being corrupted or
intercepted by entities outside of your network, but once data moves outside of your network—when you send
data to someone via e-mail or communicate with an individual over the Internet—the firewall will no longer
protect that data.
At this point, your data becomes open to hackers using a variety of methods to steal not only the data you are
transmitting but also your network login and security data. Some of the most common methods are as follows:
1) MAC Address Spoofing
Packets transmitted over a network, either your local network or the Internet, are preceded by a packet header.
These packet headers contain both the source and destination information for that packet to transmit efficiently.
A hacker can use this information to spoof (or fake) a MAC address allowed on the network. With this spoofed
MAC address, the hacker can also intercept information meant for another user.
packet: a unit of data sent over a network
2) Data Sniffing
Data “sniffing” is a method used by hackers to obtain network data as it travels through unsecured networks,
such as the Internet. Tools for just this kind of activity, such as protocol analyzers and network diagnostic tools,
are often built into operating systems and allow the data to be viewed in clear text.
3) Man in the middle attacks
Once the hacker has either sniffed or spoofed enough information, he can now perform a “man in the middle”
attack. This attack is performed, when data is being transmitted from one network to another, by rerouting the
Chapter 3: Planning Your Virtual Private Network (VPN)
Why do I need a VPN?
Wireless-N Gigabit Security Router with VPN
data to a new destination. Even though the data is not received by its intended recipient, it appears that way to
the person sending the data.
These are only a few of the methods hackers use and they are always developing more. Without the security of
your VPN, your data is constantly open to such attacks as it travels over the Internet. Data travelling over the
Internet will often pass through many different servers around the world before reaching its final destination.
That's a long way to go for unsecured data and this is when a VPN serves its purpose.
What is a VPN?
A VPN, or Virtual Private Network, is a connection between two endpoints—a VPN Router, for instance—in
different networks that allows private data to be sent securely over a shared or public network, such as the
Internet. This establishes a private network that can send data securely between these two locations or
networks.
This is done by creating a “tunnel”. A VPN tunnel connects the two PCs or networks and allows data to be
transmitted over the Internet as if it were still within those networks. Not a literal tunnel, it is a connection
secured by encrypting the data sent between the two networks.
There are two popular ways to establish a secured tunnel over the Internet — IPsec (IP Security) and SSL (Secure
Sockets Layer). IPsec runs on top of the IP layer and SSL runs over HTTP sessions. IPsec provides better data
throughput and SSL offers ease of use without the need of VPN client applications. The Wireless-N Gigabit
Security Router supports IPsec VPN for maximum throughput on data security.
VPN was created as a cost-effective alternative to using a private, dedicated, leased line for a private network.
Using industry standard encryption and authentication techniques—IPsec, short for IP Security—the VPN creates
a secure connection that, in effect, operates as if you were directly connected to your local network. Virtual
Private Networking can be used to create secure networks linking a central office with branch offices,
telecommuters, and/or professionals on the road (travelers can connect to a VPN Router using any computer
with the Linksys VPN client software.)
There are two basic ways to create a VPN connection:
encryption: encoding data transmitted in a network
ip (internet protocol): a protocol used to send data
over a network
software: instructions for the computer
IMPORTANT: You must have at least one VPN
Router on one end of the VPN tunnel. At the other
end of the VPN tunnel, you must have a second VPN
Router or a computer with the Linksys VPN client
• VPN Router to VPN Router
• Computer (using the Linksys VPN client software) to VPN Router
The VPN Router creates a “tunnel” or channel between two endpoints, so that data transmissions between them
are secure. A computer with the Linksys VPN client software can be one of the two endpoints (refer to “Appendix
C: Using the Linksys QuickVPN Software for Windows 2000 or XP”). If you choose not to run the VPN client
software, any computer with the built-in IPsec Security Manager (Microsoft 2000 and XP) allows the VPN Router
Chapter 3: Planning Your Virtual Private Network (VPN)
What is a VPN?
10
Wireless-N Gigabit Security Router with VPN
to create a VPN tunnel using IPsec (refer to “Appendix C: Configuring IPsec between a Windows 2000 or XP PC
and the Router”). Other versions of Microsoft operating systems require additional, third-party VPN client
software applications that support IPsec to be installed.
VPN Router to VPN Router
An example of a VPN Router-to-VPN Router VPN would be as follows. At home, a telecommuter uses his VPN
Router for his always-on Internet connection. His router is configured with his office's VPN settings. When he
connects to his office's router, the two routers create a VPN tunnel, encrypting and decrypting data. As VPNs
utilize the Internet, distance is not a factor. Using the VPN, the telecommuter now has a secure connection to the
central office's network, as if he were physically connected. For more information, refer to “Appendix C:
Configuring a Gateway-to-Gateway IPsec Tunnel.”
Home
PC 1
Office
PC 2
Figure 3-1: VPN Router to VPN Router
Office
Computer (using the Linksys VPN client software) to VPN Router
The following is an example of a computer-to-VPN Router VPN. In her hotel room, a traveling businesswoman
dials up her ISP. Her notebook computer has the Linksys VPN client software, which is configured with her office's
IP address. She accesses the Linksys VPN client software and connects to the VPN Router at the central office. As
VPNs utilize the Internet, distance is not a factor. Using the VPN, the businesswoman now has a secure
connection to the central office's network, as if she were physically connected.
VPN Router
WRVS4400N
WRVS4400N
PC 2
Off-site
Laptop running Linksys VPN Client Software
For additional information and instructions about creating your own VPN, please visit Linksys’s website at
www.linksys.com. You can also refer to “Appendix B: Using the Linksys QuickVPN Software for Windows 2000 or
XP” and “Appendix C: Configuring a Gateway-to-Gateway IPsec Tunnel.”
Chapter 3: Planning Your Virtual Private Network (VPN)
What is a VPN?
Figure 3-2: Computer to VPN Router
11
Wireless-N Gigabit Security Router with VPN
Chapter 4: Getting to Know the Router
The Front Panel
The Router’s LEDs are located on the front panel of the Router.
Figure 4-1: Front Panel
LEDs
POWER
Green. The POWER LED lights up when the Router is powered on. The LED flashes
when the Router runs a diagnostic test.
Chapter 4: Getting to Know the Router
The Front Panel
12
Wireless-N Gigabit Security Router with VPN
DIAG
Red. The DIAG LED lights up when the system is not ready. The LED light goes off when
the system is ready. The Diag LED blinks during Firmware upgrades.
IPS
Green/Red. The IPS LED lights up when the IPS function is enabled. The LED light is off
when the IPS functions are disabled. The IPS LED flashes green when an external
attack is detected. The IPS LED flashes red when an internal attack is detected.
WIRELESS
Green. The WIRELESS LED lights up when the wireless module is enabled. The LED is
off when the wireless module is disabled. The WIRELESS LED flashes green when the
data is transmitting or receiving on the wireless module.
1-4 (ETHERNET)
Green. For each port, there are three LEDs. If the corresponding LED is continuously lit,
the Router is connected to a device at the speed indicated through the corresponding
port (1, 2, 3, or 4). The LED flashes when the Router is actively sending or receiving
data.
INTERNET
Green. The INTERNET LED lights up the appropriate LED depending upon the speed of
the device that is attached to the Internet port. If the Router is connected to a cable or
DSL modem, typically the 10 LED will be the only LED lit up (i.e. 10Mbps). The LED
Flashes during activity.
Chapter 4: Getting to Know the Router
The Front Panel
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Wireless-N Gigabit Security Router with VPN
The Back Panels
The Router’s ports and Reset button are located on the back panel of the Router.
Figure 4-2: Back Panel
Reset Button
The Reset button can be used in one of two ways:
If the Router is having problems connecting to the Internet, press the Reset button for
just a second with a paper clip or a pencil tip. This is similar to pressing the Reset
button on your PC to reboot it.
If you are experiencing extreme problems with the Router and have tried all other
troubleshooting measures, press and hold in the Reset button for 10 seconds. This will
restore the factory defaults and clear all of the Router’s settings, such as port
forwarding or a new password.
Ports
INTERNET
The INTERNET port connects to a cable or DSL modem.
1-4 (ETHERNET)
The four ETHERNET ports connect to network devices, such as PCs, print servers, or
additional switches.
POWER
The POWER port is where you will connect the included AC power cable.
Chapter 4: Getting to Know the Router
The Back Panels
14
Wireless-N Gigabit Security Router with VPN
Antennas and Positions
The Access Point can be placed in three different positions. It can be either stackable, standalone, or wall-mount.
Antenna
The Access Point has three non-detachable 2dBi omni-directional antennas. The three
antennas have a base that can rotate 90 degrees when in the standing position. The
three antennas will all be used to support 2X3 MIMO diversity in wireless-N mode.
Figure 4-3: Stackable Position and its Antenna Setup
Chapter 4: Getting to Know the Router
Antennas and Positions
Figure 4-4: Standalone Position and its Antenna Setup
15
Wireless-N Gigabit Security Router with VPN
Chapter 5: Connecting the Router
Overview
To set up your network, you will do the following:
• Connect the Router to one of your PCs according to the instructions in this chapter.
• By default, Windows 98, 2000, Millennium, and XP computers are set to obtain an IP address automatically, so
unless you have changed the default setting, then you will not need to configure your PCs. (If you do need to
configure your PCs, refer to Windows Help for more information.)
• Set up and configure the Router with the setting(s) provided by your Internet Service Provider (ISP) according
to “Chapter 6: Setting Up and Configuring the Router.”
The installation technician from your ISP should have left the setup information with you after installing your
broadband connection. If not, you can call your ISP to request the information. Once you have the setup
information for your specific type of Internet connection, then you can begin installation and setup of the Router.
Internet
Cable or DSL
Modem
PC with Ethernet
Adapter
Wireless-N Gigabit
Security Router
Notebook with
Ethernet Adapter
Figure 5-1: Example of a Typical Network
Chapter 5: Connecting the Router
Overview
16
Wireless-N Gigabit Security Router with VPN
Connection Instructions
1. Before you begin, make sure that all of your hardware is powered off, including the Router, PCs, hubs,
switches, and cable or DSL modem.
2. Connect one end of an Ethernet network cable to one of the numbered ports on the back of the Router.
Connect the other end to an Ethernet port on a network device, e.g., a PC, print server, hub, or switch.
Repeat this step to connect more PCs or other network devices to the Router.
3. Connect your cable or DSL modem’s Ethernet cable to the Router’s Internet port.
4. Power on the cable or DSL modem and the other network device if using one.
Figure 5-2: Connect a PC
5. Connect the included AC power cable to the Router’s Power port on the side of the Router, and then plug the
power adapter into an electrical outlet.
The Power LED on the front panel will light up as soon as the power adapter is connected properly.
Proceed to “Chapter 6: Setting Up and Configuring the Router.”
Figure 5-3: Connect the Internet
Figure 5-4: Connect the Power
Chapter 5: Connecting the Router
Connection Instructions
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Wireless-N Gigabit Security Router with VPN
Placement Options
There are three ways to place the Wireless-N Router. The first way is to place it horizontally on a surface, so it sits
on its four rubber feet. The second way is to stand the Wireless Router vertically on a surface. The third way is to
mount it on a wall. The stand and wall-mount options are explained in further detail below.
Stand Option
1. Locate the Router’s left side panel.
2. The Router includes two stands. With the two large prongs facing outward, insert the short prongs into the
little slots in the Router, and push the stand upward until it snaps into place.
Repeat this step with the other stand.
Now that the hardware installation is complete, proceed to “Chapter 6: Setting up and Configuring the
Wireless-N Router,” for directions on how to set up the Wireless-N Router."
Figure 5-5: The Stand Option
Large
Prongs
Figure 5-6: Stand
Chapter 5: Connecting the Router
Placement Options
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Wireless-N Gigabit Security Router with VPN
Wall-Mount Option
You will need two suitable screws (See Figure 5-7) to mount the Router. Make sure the screw size can fit into the
criss-cross wall-mount slots.
1. On the Wireless Router’s back panel are two criss-cross wall-mount slots.
2. Determine where you want to mount the Wireless Router, and install two screws that are 2-9/16 in (64.5mm)
apart.
3. Line up the Wireless Router so that the wall-mount slots line up with the two screws.
Figure 5-7: Mounting Dimensions
4. Place the wall-mount slots over the screws and slide the Wireless Router down until the screws fit snugly into
the wall-mount slots.
Now that the hardware installation is complete, proceed to “Chapter 6: Setting up and Configuring the
Wireless-N Router,” for directions on how to set up the Wireless-N Router."
Figure 5-8: Wall Mounting Hardware
Chapter 5: Connecting the Router
Placement Options
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Wireless-N Gigabit Security Router with VPN
Chapter 6: Setting Up and Configuring the Router
Overview
The Wireless Router has been designed to be functional right out of the box with the default settings. However, if
you'd like to change these settings, the Wireless Router can be configured through your web browser with the
Web-based Utility. This chapter explains how to use the Utility to perform the most basic settings.
The Utility can be accessed via web browsers, such as Microsoft Internet Explorer or Mozilla Firefox through the
use of a computer that is networked with the Wireless Router.
Basic Setup
For a basic network setup, most users only need to use the following screens of the Utility:
• Setup->WAN
Click the Setup tab and then select the WAN screen. Select the appropriate Internet Connection Type
according to your ISP if connecting your WAN port to the WAN (DSL or cable modem). Otherwise, most cases
can leave the default setting to get a WAN port IP address from a DHCP server.
• Setup->Advanced Routing
Click the Setup tab and then select the Advanced Routing screen. If you are connecting the Router to the
Internet, leave the default setting. Otherwise, choose the Intranet Router Operation Mode to disable NAT
(Network Address Translation).
• Management
Click the Administration tab and then select the Management screen. Change the access password for the
Router’s Web-based Utility. The default username and password are admin.
Most users will also customize their wireless settings:
• Wireless
On the Wireless screen, change the default SSID on the Basic Wireless Settings Tab. Select the level of
security under the Wireless Security Tab and complete the options for the selected security mode. When the
appropriate security mode is configured, disable SSID Broadcast on the Basic Wireless Settings Tab.
Chapter 6: Setting Up and Configuring the Router
Overview
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Wireless-N Gigabit Security Router with VPN
How to Access the Web-based Utility
There are two ways to connect to your Wireless Router for the first time.
1. Connect your PC to one of the four LAN ports on the Router. (Refer to "Chapter 5: Connecting the Router.")
Then, configure your PC to obtain IP address automatically through a DHCP server.
2. Although it is not recommended, you can also connect your PC wirelessly to the Wireless Router. Then,
configure the wireless interface of your PC to obtain IP address automatically through a DHCP server. It is not
recommended, because you can easily lose your connection through wireless configuration changes.
To access the Web-based Utility of the Router:
• Launch a web browser, such as Internet Explorer or Mozilla Firefox, and enter the Router’s default IP address,
192.168.1.1, in the Address field. Press the Enter key.
Figure 6-1: Router’s IP Address
• A screen will appear asking you for your User name and Password. Enter admin in the User Name field, and
enter your password (default password is admin) in the Password field. Then click the OK button.
How to Navigate the Utility
The Web-based Utility consists of the following nine main tabs: Setup, Wireless, Firewall, VPN, QoS,
Administration, IPS, L2 Switch and Status. Additional screens (sub tabs) will be available from most of the main
tabs.
The following briefly describes the main & sub tabs of the Utility.
Setup
You will use the Setup tabs to define the Router’s basic functionality.
• IP Version. This screen provides options for IPv4 mode or Dual-Stack IPv4 and IPv6 mode.
Figure 6-2: Login Screen for Web-based
Utility
• WAN. The Internet connection settings are entered and displayed on this screen.
• LAN. The Local Area Network (LAN) settings are entered and displayed on this screen.
• DMZ. The DMZ (Demilitarized Zone) Host feature allows one local user to be exposed to the Internet to use a
special-purpose service such as Internet gaming or video conferencing.
Chapter 6: Setting Up and Configuring the Router
How to Access the Web-based Utility
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Wireless-N Gigabit Security Router with VPN
• MAC Address Clone. Some ISPs require that you register a MAC address. This feature clones your network
adapter's MAC address onto the Router, which prevents you from having to call your ISP to change the
registered MAC address to the Router's MAC address.
• Advanced Routing. Select the Router’s operation mode either connecting to the Internet or Intranet (NAT is
only enabled while connecting to the Internet). Configure dynamic or static routing. The Router support RIP
version 1 and 2 to automatically exchange routing information and establish its routing table.
• Time. Change the time settings on this screen.
Wireless
You will use the Wireless tabs to enter a variety of wireless settings for the built-in access point of the Router.
• Basic Wireless Settings. Choose the wireless network mode (e.g. B/G/N-Mixed), SSID, and radio channel on
this screen.
• Wireless Security. Use this screen to configure the built-in access point’s security settings.
• Wireless Connection Control. Use this screen to control the wireless connections from client devices to the
Router.
• Advanced Wireless Settings. Use this screen to configure the built-in access point’s more advanced wireless
settings (e.g. Tx Rate Limiting, Channel Bandwidth, etc.).
Firewall
You will use the Firewall tabs to configure basic firewall settings, IP access list, and Network Address Port
Translation settings for your network’s security.
• Basic Settings. Basic Firewall settings are configured from here.
• IP Based ACL. Define IP based Access List to block specific hosts, networks, and protocols (services).
• Internet Access Policy. This screen defines the time schedule to allow or block complete Internet access or to
specific URLs from the Router.
• Single Port Forwarding. Use this screen to set up public services or other specialized Internet applications
with a single port on your network.
• Port Range Forwarding. Use this screen to set up public services or other specialized Internet applications on
your network using a port range.
Chapter 6: Setting Up and Configuring the Router
How to Navigate the Utility
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Wireless-N Gigabit Security Router with VPN
• Port Range Triggering. Use this screen to set up triggered ranges and forwarded ranges to allow special
Internet applications to pass through this NAT Router.
• Service. Use this screen to define customized IP applications based on TCP or UDP. The user-defined service
type will be available when defining IP based ACL rules.
VPN
You will use VPN tabs to configure VPN tunnels and accounts to establish a secured channel through Internet.
• IPSec VPN. The VPN Router can create one or multiple tunnels (or secure channel) that each connect between
two endpoints, so that the transmitted data or information between these endpoints is secure.
• VPN Client Accounts. Use this screen to designate VPN clients and their passwords.
• VPN Pass Through. This tab allows you to disable IPSec Passthrough, PPTP Passthrough, and L2TP
Passthrough.
QoS
The Router support two types of Quality of Service (QoS) traffic.
• Application-based QoS. This allows you to assign different traffic priorities for different types of applications.
• Port-based QoS. This allows you to assign traffic priorities on different LAN ports.
Administration
You will use Administration tabs for systems administration purposes.
• Management. You can alter the Router’s password, its access privileges, SNMP settings, and UPnP settings
on this screen.
• Log. This screen allows the configuration of Log settings.
• Diagnostics. On this screen, you can check the connection between the Router and another network device
on the LAN or Internet.
• Config Management. This screen allows you to save and restore Router configuration settings.
• Factory Defaults. If you need to restore the Router’s factory defaults, use this screen.
Chapter 6: Setting Up and Configuring the Router
How to Navigate the Utility
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Wireless-N Gigabit Security Router with VPN
• Reboot. If you need to reboot the Router remotely, use this screen.
• Firmware Upgrade. Use this screen to upgrade the Router’s firmware.
IPS
You will use this tab for advanced configuration on built-in Intrusion Prevention System (IPS) inside the Router.
• Configure. Enable or disable IPS functions from this screen.
• P2P/IM. Allows or blocks specific Peer to Peer (P2P) networks and Instant Messaging (IM) applications.
• Report. Provides reports of network traffic and malicious attacks.
• Information. Provides the signature file version and the Protection Scope of the IPS system.
L2 Switch
You will use this tab to configure layer 2 switching features on the 4 port Ethernet Switch (LAN ports only).
• VLAN. Virtual Local Area Network (VLAN) assignment is done on this screen.
• RADIUS. Used for configuration of Remote Authorization Dial-In User Service (RADIUS) settings.
• Port Setting. Allows configuration of port speeds and duplex.
• Cable Diagnostics. Used for testing the cables that are connected to the LAN ports.
Status
You will use this tab to get the current status on the Router.
• WAN / Gateway. This screen provides basic information like firmware version and status information on the
WAN port.
• Local Network. This screen provides status information about the local network (four Ethernet Ports).
• Wireless LAN. This screen provides status information on Wireless LAN.
• System Performance. This screen provides traffic statistics on LAN and Wireless LAN ports.
• VPN Clients. This screen provides status information about the Router’s VPN clients (gateway-to-client).
Chapter 6: Setting Up and Configuring the Router
How to Navigate the Utility
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Wireless-N Gigabit Security Router with VPN
• IPsec. This screen provides status information about the Router’s IPsec VPN tunnels (gateway-to-gateway).
Setup Tab
The Setup screen contains all of the Router’s basic setup functions. The Router can be used in most network
settings without changing any of the default values. Some users may need to enter additional information in
order to connect to the Internet through an ISP (Internet Service Provider) or broadband (DSL, cable modem)
carrier.
IP Versions
IPv4 Only. This option utilizes IPv4 on the Internet and local network.
Dual-Stack IP. This options utilizes IPv4 over the Internet and IPV4 and IPv6 on the local network.
Click the Save Settings button to save the network settings or click the Cancel Changes button to undo your
changes.
Figure 6-1: Setup - IP Versions
Chapter 6: Setting Up and Configuring the Router
Setup Tab
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Wireless-N Gigabit Security Router with VPN
WAN
The WAN Setup screen provides Internet Connection Type and DDNS configurations on the WAN port of the
Wireless Router. Before starting, you need to find out the Internet Connection Type and settings used by your ISP.
If the Router is used as an Intranet Router, you can mostly use the default settings. If you want to use the dynamic
DNS feature, you will need to sign up for a DDNS service.
Internet Connection Type
The Router supports six connection types. Each WAN Setup screen and available options will differ depending on
what kind of connection type you select.
Automatic Configuration - DHCP
By default, the Router’s Configuration Type is set to Automatic Configuration - DHCP. The Router will get its
IP address from a DHCP server of the ISP. Most cable modem ISPs use this option.
Figure 6-2: Setup - WAN (DHCP)
Static IP
If your connection uses a permanent IP address to connect to the Internet, then select Static IP.
Internet IP Address. This is the Router’s IP address on the WAN port that can be reached from the Internet.
Your ISP will provide you with the IP Address you need to specify here.
Subnet Mask. This is the Router’s Subnet Mask on the WAN port. Your ISP will provide you this information
and your IP Address.
Default Gateway. Your ISP will provide you with the Default Gateway (Router) to reach the Internet.
Primary DNS (Required) and Secondary DNS (Optional). Your ISP will provide you with at least one DNS
(Domain Name System) Server IP Address to resolve host name to IP address mapping.
Figure 6-3: Setup - WAN (Static IP)
Chapter 6: Setting Up and Configuring the Router
Setup Tab
26
Wireless-N Gigabit Security Router with VPN
PPPoE
Most DSL-based ISPs use PPPoE (Point-to-Point Protocol over Ethernet) to establish Internet connections. If
you are connected to the Internet through a DSL line, check with your ISP to see if they use PPPoE. If they do,
you will have to enable PPPoE.
User Name and Password. Enter the User Name and Password provided by your ISP for PPPoE
authentication.
Connect on Demand: Max Idle Time. You can configure the Router to cut the Internet connection after it has
been inactive for a specified period of time (Max Idle Time). If your Internet connection has been terminated
due to inactivity, Connect on Demand enables the Router to automatically re-establish your connection as
soon as you attempt to access the Internet again. If you wish to activate Connect on Demand, click the
Connect on Demand option and enter the number of minutes you want to have elapsed before your Internet
connection terminates in the Max Idle Time field. Use this option to minimize your DSL connection time if it is
charged based on time. This option is disabled by default.
Keep Alive Redial period. This option allows the Router will periodically check your Internet connection. If
you are disconnected, then the Router will automatically re-establish your connection. To use this option,
click the option next to Keep Alive. In the Redial Period field, you specify how often you want the Router to
check the Internet connection. This option is enabled by default and the default Redial Period is 30 seconds.
Use this option to minimize your Internet connection response time since it will always be connected.
Figure 6-4: Setup - WAN (PPPoE)
PPTP
Point-to-Point Tunneling Protocol (PPTP) is a service that applies to connections in Europe and Israel only.
IP Address. This is the Router’s IP address, when seen from the WAN, or the Internet. Your ISP will provide
you with the IP Address you need to specify here.
Subnet Mask. This is the Router’s Subnet Mask. Your ISP will provide you the Subnet Mask and your IP
address.
Default Gateway. Your ISP will provide you with the Default Gateway IP Address.
PPTP Server. Enter the IP address of the PPTP server.
User Name and Password. Enter the User Name and Password provided by your ISP.
Figure 6-5: Setup - WAN (PPTP)
Chapter 6: Setting Up and Configuring the Router
Setup Tab
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Wireless-N Gigabit Security Router with VPN
Connect on Demand: Max Idle Time. You can configure the Router to cut the Internet connection after it has
been inactive for a specified period of time (Max Idle Time). If your Internet connection has been terminated
due to inactivity, Connect on Demand enables the Router to automatically re-establish your connection as
soon as you attempt to access the Internet again. If you wish to activate Connect on Demand, click the
Connect on Demand option and enter the number of minutes you want to have elapsed before your Internet
connection terminates in the Max Idle Time field. Use this option to minimize your DSL connection time if it is
charged based on time. This option is disabled by default.
Keep Alive Redial period. If you select this option, the Router will periodically check your Internet
connection. If you are disconnected, then the Router will automatically re-establish your connection. To use
this option, click the option next to Keep Alive. In the Redial Period field, you specify how often you want the
Router to check the Internet connection. This option is enabled by default and the default Redial Period is 30
seconds. Use this option to minimize your Internet connection response time since it will always be
connected.
Heart Beat Signal
Heart Beat Signal is a service used in Australia. Check with your ISP for the necessary setup information.
User Name and Password. Enter the User Name and Password provided by your ISP.
Heart Beat Server. Enter the IP address of the Heart Beat server.
Connect on Demand: Max Idle Time. You can configure the Router to cut the Internet connection after it has
been inactive for a specified period of time (Max Idle Time). If your Internet connection has been terminated
due to inactivity, Connect on Demand enables the Router to automatically re-establish your connection as
soon as you attempt to access the Internet again. If you wish to activate Connect on Demand, click the
Connect on Demand option and enter the number of minutes you want to have elapsed before your Internet
connection terminates in the Max Idle Time field. Use this option to minimize your DSL connection time if it is
charged based on time. This option is disabled by default.
Keep Alive Redial period. If you select this option, the Router will periodically check your Internet
connection. If you are disconnected, then the Router will automatically re-establish your connection. To use
this option, click the option next to Keep Alive. In the Redial Period field, you specify how often you want the
Router to check the Internet connection. This option is enabled by default and the default Redial Period is 30
seconds. Use this option to minimize your Internet connection response time since it will always be
connected.
Chapter 6: Setting Up and Configuring the Router
Setup Tab
Figure 6-6: Setup - WAN (Heart Beat Signal)
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Wireless-N Gigabit Security Router with VPN
L2TP
Layer 2 Tunneling Protocol (L2TP) is a service that tunnels Point-to-Point Protocol (PPP) across the Internet. It
is used mostly in European countries. Check with your ISP for the necessary setup information.
IP Address. This is the Router’s IP address, when seen from the WAN, or the Internet. Your ISP will provide
you with the IP Address you need to specify here.
Subnet Mask. This is the Router’s Subnet Mask. Your ISP will provide you with the Subnet Mask and your IP
address.
Gateway. Your ISP will provide you with the Default Gateway IP Address.
L2TP Server. Enter the IP address of the L2TP server.
User Name and Password. Enter the User Name and Password provided by your ISP.
Connect on Demand: Max Idle Time. You can configure the Router to cut the Internet connection after it has
been inactive for a specified period of time (Max Idle Time). If your Internet connection has been terminated
due to inactivity, Connect on Demand enables the Router to automatically re-establish your connection as
soon as you attempt to access the Internet again. If you wish to activate Connect on Demand, click the
Connect on Demand option and enter the number of minutes you want to have elapsed before your Internet
connection terminates in the Max Idle Time field. Use this option to minimize your DSL connection time if it is
charged based on time. This option is disabled by default.
Figure 6-7: Setup - WAN (L2TP)
Keep Alive Redial period. If you select this option, the Router will periodically check your Internet
connection. If you are disconnected, then the Router will automatically re-establish your connection. To use
this option, click the option next to Keep Alive. In the Redial Period field, you specify how often you want the
Router to check the Internet connection. This option is enabled by default and the default Redial Period is 30
seconds. Use this option to minimize your Internet connection response time since it will always be
connected.
Chapter 6: Setting Up and Configuring the Router
Setup Tab
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Wireless-N Gigabit Security Router with VPN
Optional Settings (Required by some ISPs)
This section is common for all the Internet Connection Types. Some of these settings may be required by your ISP.
Verify with your ISP before making any changes.
Host Name: Some ISPs, usually cable ISPs, require a host name as identification. You may need to check with
your ISP to see if your broadband Internet service is configured with a host name. In most cases you can leave
this field blank.
Domain Name: Some ISPs, usually cable ISPs, require a domain name as identification. You may need to check
with your ISP to see if your broadband Internet service is configured with a domain name. In most cases you can
leave this field blank.
MTU: MTU is the Maximum Transmission Unit. It specifies the largest packet size permitted for Internet
transmission. Select Manual if you want to manually enter the largest packet size that is transmitted. To have the
Router select the best MTU for your Internet connection, keep the default setting, Auto.
Figure 6-8: Setup - WAN (Optional Settings)
Size: When Manual is selected in the MTU field, this option is enabled. The recommended setting for this field is
1500 (standard MTU size on Ethernet media).
Chapter 6: Setting Up and Configuring the Router
Setup Tab
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Wireless-N Gigabit Security Router with VPN
DDNS
The Router offers a Dynamic Domain Name System (DDNS) feature. DDNS lets you assign a fixed host and domain
name to a dynamic Internet IP address. It is useful when you are hosting your own website, FTP server, or other
server behind the Router.
Before you can use this feature, you need to sign up for DDNS service at DynDNS.org or TZO.com.
DDNS Service. If your DDNS service is provided by DynDNS.org, then select DynDNS.org from the drop-down
menu. If your DDNS service is provided by TZO.com, then select TZO.com from the drop-down menu.To disable
DDNS Service, select Disabled.
DynDNS.org
• User Name, Password, and Host Name. Enter the User Name, Password, and Host Name of the account you
set up with DynDNS.org.
Figure 6-9: Setup - WAN (DynDNS.org)
• Status. The status of the DDNS service connection is displayed here.
TZO.com
• E-mail Address, TZO Password, and Domain Name. Enter the E-mail Address, Password, and Domain Name of
the account you set up with TZO.
• Status. The status of the TZO service connection is displayed here.
After entering the necessary information, the Router will advise the DDNS Service of your current WAN (Internet)
IP address whenever this address changes. If using TZO, you should NOT use the TZO software to perform this “IP
address update”.
Connect button: When DDNS is enabled, the Connect button is displayed. Use this button to manually update
your IP address information on the DDNS server. The Status area on this screen also updates.
Click the Save Settings button to save the network settings or click the Cancel Changes button to undo your
changes.
Chapter 6: Setting Up and Configuring the Router
Setup Tab
Figure 6-10: Setup - WAN (TZO.com)
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Wireless-N Gigabit Security Router with VPN
LAN
The LAN Setup section allows you to change the Router’s local network settings for the four Ethernet ports.
IPv4
The Router’s Local IPv4 Address and Subnet Mask are shown here. In most cases, you can keep the defaults.
Local IP Address. Enter the IPv4 address on the LAN side. The default value is 192.168.1.1.
Subnet Mask. Select the subnet mask from the drop-down menu. The default value is 255.255.255.0.
Server Settings (DHCP)
The Router can be used as your network’s DHCP (Dynamic Host Configuration Protocol) server, which
automatically assigns an IP address to each PC on your network. Unless you already have one, it is highly
recommended that you leave the Router enabled as a DHCP server.
DHCP Server. DHCP is enabled by default. If you already have a DHCP server on your network, or you don't want
a DHCP server, then select Disabled (no other DHCP features will be available). If you already have a DHCP server
on your network, and you want the Router to act as a Relay for that DHCP Server, select DHCP Relay, then enter
the DHCP Server IP Address.
Figure 6-11: Setup - LAN
Starting IP Address. Enter a value for the DHCP server to start with when issuing IP addresses. This value will
automatically follow your local IP address settings. Normally, you assign the first IP address for the Router (e.g.
192.168.1.1) so that you can assign an IP address to other devices starting from the 2nd IP address (e.g.
192.168.1.2). The last address in the subnet is for subnet broadcast (e.g. 192.168.1.255) so that the address
cannot be assigned to any host.
Maximum Number of DHCP Users. Enter the maximum number of PCs that you want the DHCP server to assign
IP addresses to. This number cannot be greater than the available host addresses in the subnet (e.g. 253 for /24
subnet). In order to determine the DHCP IP Address range, add the starting IP address (e.g., 100) to the number of
DHCP users.
Client Lease Time. This is the amount of time a DHCP client can keep the assigned IP address before it sends a
renewal request to the DHCP server. The default value is 0, which actually means one day.
Static DNS 1-3. If applicable, enter the IP address(es) of your DNS server(s).
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WINS. The Windows Internet Naming Service (WINS) performs name resolution function (similar to DNS) in the
Windows network environment. It can help you to determine the IP address of a remote Windows PC from its
computer name. If you have a WINS server, enter that server's IP Address here. Otherwise, leave this blank.
IPv6
IPv6 Address. If you selected dual-stack option under IP Versions Setup screen, enter the IPv6 address on the
LAN side of the Router.
Prefix Length. Enter the IPv6 prefix length. The default is 64, which should not need to be changed.
Router Advertisement. Enabling this option allows the Router to send out IPv6 Router Advertisement packets
periodically. This helps IPv6 hosts to learn their IPv6 prefix and setup their IPv6 Address automatically.
Primary DNS. Enter the Primary IPv6 DNS server address.
Secondary DNS. Enter the Secondary IPv6 DNS server address.
Click the Save Settings button to save the network settings or click the Cancel Changes button to undo your
changes.
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DMZ
The DMZ screen allows one local PC to be exposed to the Internet for use of a special-purpose service, such as
Internet gaming and video-conferencing. DMZ hosting forwards traffic to all the ports for the specified PC
simultaneously, unlike Port Range Forwarding that can only forward a maximum of 10 ranges of ports.
DMZ Hosting. This feature allows one local PC to be exposed to the Internet for use of a special-purpose service
such as Internet gaming and video-conferencing. To use this feature, select Enabled. To disable the DMZ feature,
select Disabled.
DMZ Host IP Address. To expose one PC, enter the computer’s IP address.
Figure 6-12: Setup - DMZ
Click the Save Settings button to save the network settings or click the Cancel Changes button to undo your
changes.
MAC Address Clone
Some ISPs require that you register a MAC address. This feature clones your PC network adapter's MAC address
onto the Router, and prevents you from having to call your ISP to change the registered MAC address to the
Router's MAC address. The Router's MAC address is a 6-byte hexadecimal number assigned to a unique piece of
hardware for identification.
Mac Address Clone. Select Enabled or Disabled. The default is Enabled.
Mac Address. Enter the MAC Address registered with your ISP in this field.
Clone My PC’s MAC button. When Mac Address Clone is enabled, click this to copy the MAC address of the
network adapter in the computer that you are using to connect to the Web-based utility.
Figure 6-13: Setup - MAC Address Clone
Click Save Settings to save the MAC Cloning settings or click the Cancel Changes button to undo your changes.
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Advanced Routing
Operating Mode
Select the Operating mode in which the Router will function.
Internet Gateway. This is the normal mode of operation. This allows all devices on your LAN to share the same
WAN (Internet) IP address. In the Internet Gateway mode, the NAT (Network Address Translation) mechanism is
enabled.
Intranet Router. You either need another Router to act as the Internet Gateway, or all PCs on your LAN must be
assigned (fixed) Internet IP addresses. In Intranet Router mode, the NAT mechanism is disabled.
Dynamic Routing
The Router's dynamic routing feature can be used to automatically establish a routing table through a database
exchange with peer routers (running the same routing protocol). The Router supports RIP (Routing Information
Protocol) versions 1 & 2.
Figure 6-14: Setup - Advanced Routing
RIP (Routing Information Protocol. The Router, using the RIP protocol, calculates the most efficient route for
the network’s data packets to travel between the source and the destination based upon the shortest paths.
RIP Send Packet Version. Choose the version of RIP packets you want to send to peers: RIPv1 or RIPv2. This
should match the version supported by other Routers on your LAN.
RIP Recv Packet Version. Choose the version of RIP packets you want to receive from peers: RIPv1 or RIPv2.
This should match the version supported by other Routers on your LAN.
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Static Routing
Sometimes you will prefer to use static routes to build your routing table instead of using dynamic routing
protocols. Static routes do not require CPU resources to exchange routing information with a peer router. You can
also use static routes to reach peer routers that do not support dynamic routing protocols. Static routes can be
used together with dynamic routes. Be careful not to introduce routing loops in your network.
To set up static routing, you should add route entries in the routing table that tell the Router where to forward
packets to specific IP destinations.
Enter the following data to create a static route entry:
1. Select Set Number. Select the set number (routing table entry number) that you wish to view or configure. If
necessary, click Delete This Entry to clear the entry.
2. Destination IP Prefix. Enter the network address of the remote LAN segment. For a standard Class C IP
domain, the network address is the first three fields of the Destination LAN IP; the last field should be zero.
3. Subnet Mask. Enter the Subnet Mask used on the destination LAN IP domain. For Class C IP domains, the
Subnet Mask is 255.255.255.0.
4. Next Hop Router. Enter the next hop router used to reach your destination LAN, as defined in Step (2).
5. Hop Count (max. 15). This value gives the number of routers that a data packet passes through before
reaching its destination. It is used to define the priority on which route to use if there is a conflict between a
static route and dynamic route.
Figure 6-15: Setup - Advanced Routing (Routing
Table)
Show Routing Table button. Click this button to show the routing table established either through dynamic or
static routing methods.
Click the Save Settings button to save the Routing settings, click the Cancel Changes button to undo your
changes or click the Show Routing Table button to view the current routing table.
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Time
You can either define your Router’s time manually or automatically through Time Server. The default is
Automatically.
Manually
If you wish to enter the time and date manually, select the Date from the drop-down fields and enter the hour,
minutes, and seconds in the Time field using 24 hour format (example 10:00pm would be entered 22:0:0).
Automatically
Time Zone. Select the time zone for your location and your setting synchronizes over the Internet with public NTP
(Network Time Protocol) Servers.
Figure 6-16: Setup - Time
User Defined NTP Server. If you want to use your own NTP server, select the Enabled option. The default is
Disabled.
NTP Server IP Address. Enter the IP address of your own NTP server.
Click the Save Settings button to save the Routing settings, click the Cancel Changes button to undo your
changes or click the Show Routing Table button to view the current routing table.
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Wireless Tab
Basic Wireless Settings
Change the basic wireless network settings on this screen.
Basic Settings
Configure the basic Wireless Network attributes for this Wireless Router.
SSID Name. The SSID is the unique name shared between all devices in a wireless network. It is case-sensitive,
must not exceed 32 alphanumeric characters, and may be any keyboard character. Make sure this setting is the
same for all devices in your wireless network. The default SSID name is linksys-n.
Figure 6-17: Wireless - Basic Wireless Settings
Wireless Network Mode. Select one of the following modes. The default is B/G/N-Mixed.
B-Only: All the wireless client devices can be connected to the Wireless Router at Wireless-B data rates with
a maximum speed of 11Mbps.
G-Only: Both Wireless-N and Wireless-G client devices can be connected at Wireless-G data rates with a
maximum speed of 54Mbps. Wireless-B clients cannot be connected in this mode.
N-Only: Only Wireless-N client devices can be connected at Wireless-N data rates with a maximum speed of
300Mbps.
B/G-Mixed: Both Wireless-B and Wireless-G client devices can be connected at their respective data rates.
Wireless-N devices can be connected at Wireless-G data rates.
G/N-Mixed: Both Wireless-G and Wireless-N client devices can be connected at their respective data rates.
Wireless-B clients cannot be connected in this mode.
B/G/N-Mixed: All the wireless client devices can be connected at their respective data rates in this mixed
mode.
Disabled: To disable wireless connectivity completely. This might be useful during system maintenance.
Wireless Channel. Select the appropriate channel to be used between your Wireless Router and your client
devices. The default is channel 6. You can also select Auto so that your Wireless Router will select the channel
with the lowest amount of wireless interference while the system is booting up. Auto channel selection will start
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when you click the Save Settings button, and it will take several seconds to scan through all the channels to find
the best channel. For the Wireless-N 40MHz channel option (see Wireless - Advanced Wireless Settings Tab), the
Wireless Router will automatically select the adjacent 20MHz channel to combine them into a wider channel.
SSID Broadcast. This option allows the SSID to be broadcast on your network. You may want to enable this
function while configuring your network, but make sure that you disable it when you are finished. With this
enabled, someone could easily obtain the SSID information with site survey software or Windows XP and gain
unauthorized access to your network. Click Enabled to broadcast the SSID to all wireless devices in range. Click
Disabled to increase network security and prevent the SSID from being seen on networked PCs. The default is
Enabled in order to help users configure their network before use.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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Wireless Security
Change the Wireless Router’s wireless security settings on this screen.
Wireless Security
Security Mode. Select the wireless security mode you want to use, WPA-Personal, WPA2-Personal,
WPA2-Personal Mixed, WPA-Enterprise, WPA2-Enterprise, WPA2-Enterprise Mixed, or WEP. (WPA stands
for Wi-Fi Protected Access, which is a security standard stronger than WEP encryption and forward compatible
with IEEE 802.11e. WEP stands for Wired Equivalent Privacy, Enterprise refers to using RADIUS server for
authentication, while RADIUS stands for Remote Authentication Dial-In User Service.) Refer to the appropriate
instructions below after you select the Authentication Type and SSID Interoperability settings. To disable wireless
security completely, select Disabled. The default is Disabled.
Figure 6-18: Wireless - Wireless Security
(Disabled)
Wireless Isolation (within SSID). When disabled, wireless PCs that are associated to the same network name
(SSID), can see and transfer files between each other. By enabling this feature, Wireless PCs will not be able to
see each other. This feature is very useful when setting up a wireless hotspot location. The default is Disabled.
The following section describes the detailed options for each Security Mode.
Disabled
To disable wireless security completely, select Disabled.
WPA-Personal (also known as WPA-PSK)
WPA Algorithms. WPA offers you two encryption methods, TKIP and AES for data encryption. Select the type of
algorithm you want to use, TKIP or AES. The default is TKIP.
Figure 6-19: Wireless - Wireless Security
(WPA-Personal)
WPA Shared Key. Enter a WPA Shared Key of 8-63 characters.
Key Renewal Timeout. Enter a Key Renewal Timeout period, which instructs the Wireless Router how often it
should change the encryption keys. The default is 3600 seconds.
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WPA2-Personal
WPA Algorithms. WPA2 always uses AES for data encryption.
WPA Shared Key. Enter a WPA Shared Key of 8-63 characters.
Key Renewal Timeout. Enter a Key Renewal Timeout period, which instructs the Wireless Router how often it
should change the encryption keys. The default is 3600 seconds.
WPA2-Personal Mixed
Figure 6-20: Wireless - Wireless Security
(WPA2-Personal)
This security mode supports the transition from WPA-Personal to WPA2-Personal. You can have client devices
that use either WPA-Personal or WPA2-Personal. The Wireless Router will automatically choose the encryption
algorithm used by each client device.
WPA Algorithms. Mixed Mode automatically chooses TKIP or AES for data encryption.
WPA Shared Key. Enter a WPA Shared Key of 8-63 characters.
Key Renewal Timeout. Enter a Key Renewal Timeout period, which instructs the Wireless Router how often it
should change the encryption keys. The default is 3600 seconds.
Figure 6-21: Wireless - Wireless Security
(WPA2-Personal Mixed)
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WPA-Enterprise
This option features WPA used in coordination with a RADIUS server for client authentication. (This should only be
used when a RADIUS server is connected to the Wireless Router.)
RADIUS Server IP Address. Enter the RADIUS server’s IP address.
RADIUS Server Port. Enter the port number used by the RADIUS server. The default is 1812.
WPA Algorithms. WPA offers you two encryption methods, TKIP and AES for data encryption. Select the type of
algorithm you want to use, TKIP or AES. The default is TKIP.
Shared Secret. Enter the Shared Secret key used by the Wireless Router and RADIUS server.
Key Renewal Timeout. Enter a Key Renewal Timeout period, which instructs the Wireless Router how often it
should change the encryption keys. The default is 3600 seconds.
Figure 6-22: Wireless - Wireless Security
(WPA-Enterprise)
WPA2-Enterprise
This option features WPA2 used in coordination with a RADIUS server for client authentication. (This should only
be used when a RADIUS server is connected to the Wireless Router.)
RADIUS Server IP Address. Enter the RADIUS server’s IP address.
RADIUS Server Port. Enter the port number used by the RADIUS server. The default is 1812.
WPA Algorithms. WPA2 always uses AES for data encryption.
Shared Secret. Enter the Shared Secret key used by the Wireless Router and RADIUS server.
Key Renewal Timeout. Enter a Key Renewal Timeout period, which instructs the Wireless Router how often it
should change the encryption keys. The default is 3600 seconds.
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Figure 6-23: Wireless - Wireless Security
(WPA2-Enterprise)
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WPA2-Enterprise Mixed
This security mode supports the transition from WPA-Enterprise to WPA2-Enterprise. You can have client devices
that use either WPA-Enterprise or WPA2-Enterprise. The Wireless Router will automatically choose the encryption
algorithm used by each client device.
RADIUS Server IP Address. Enter the RADIUS server’s IP address.
RADIUS Server Port. Enter the port number used by the RADIUS server. The default is 1812.
WPA Algorithms. Mixed Mode automatically chooses TKIP or AES for data encryption.
Shared Secret. Enter the Shared Secret key used by the Wireless Router and RADIUS server.
Key Renewal Timeout. Enter a Key Renewal Timeout period, which instructs the Wireless Router how often it
should change the encryption keys. The default is 3600 seconds.
Figure 6-24: Wireless - Wireless Security
(WPA2-Enterprise Mixed)
WEP
This security mode is defined in the original IEEE 802.11. This mode is not recommended now due to its weak
security protection. Users are urged to migrate to WPA or WPA2.
Authentication Type. Choose the 802.11 authentication type as either Open System or Shared Key. The default
is Open System.
Default Transmit Key. Select the key to be used for data encryption.
WEP Encryption. Select a level of WEP encryption, 64 bits (10 hex digits) or 128 bits (26 hex digits).
Passphrase. If you want to generate WEP keys using a Passphrase, then enter the Passphrase in the field
provided and click the Generate key.
Key 1-4. If you want to manually enter WEP keys, then complete the fields provided. Each WEP key can consist of
the letters “A” through “F” and the numbers “0” through “9”. It should be 10 characters in length for 64-bit
encryption or 26 characters in length for 128-bit encryption.
Figure 6-25: Wireless - Wireless Security (WEP)
Tx Key. Select one of the keys to be used for data encryption (when you manually enter multiple WEP keys).
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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Wireless Connection Control
This screen allows you to configure the Connection Control List to either permit or block specific wireless client
devices connecting to (associating with) the Wireless Router.
Wireless Connection Control
Enabled/Disabled. Enable or disable wireless connection control. The default is Disabled.
Connection Control
There are two ways to control the connection (association) of wireless client devices. You can either prevent
specific devices from connecting to the Wireless Router, or you can allow only specific client devices to connect
to the Wireless Router. The client devices are specified by their MAC addresses. The default is to allow only
specific client devices.
Wireless Client List
Instead of manually entering the MAC addresses of each client, the Wireless Router provides a convenient way to
select a specific client device from the client association table. Click this button and a window appears to let you
select a MAC address from the table. The selected MAC address will be entered into the Connection Control List.
Figure 6-26: Wireless - Wireless Connection
Control
Connection Control List
MAC 01-20. Enter the MAC addresses of the wireless client devices you want to control.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen.
Figure 6-27: Select MAC Address from Wireless
Client List
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Advanced Wireless Settings
This screen allows you to configure the advanced settings for the Wireless Router. The Wireless-N Router adopts
several new parameters to adjust the channel bandwidth and guard intervals to improve the data rate
dynamically. Linksys recommends to let your Wireless Router automatically adjust the parameters for maximum
data throughput.
Advanced Wireless
You can change the following advanced parameters (some only for Wireless-N) for this Wireless Router.
Wireless-N data rates are classified into 16 MCS numbers (0-15). MCS stands for Modulation and Coding
Scheme. For the same MCS number, the data rate changes according to the Channel Bandwidth and Guard
Interval settings. You can see the change through the drop-down menu of Tx Rate Limiting (11n clients).
Channel Bandwidth. You can select the channel bandwidth manually for Wireless-N connections. When it is set
to 20MHz, only the 20MHz channel is used. When it is set to 40MHz, Wireless-N connections will use 40MHz
channel but Wireless-B and Wireless-G will still use 20MHz channel. The default is Auto.
Figure 6-28: Wireless - Advanced Wireless
Settings
Guard Interval. You can select the guard interval manually for Wireless-N connections. The two options are
Short (400ns) and Long (800ns). The default is Auto.
Tx Rate Limiting (11b clients). This option provides rate limiting on Wireless-B connections. Wireless-B clients
can be limited to data rate specified by IEEE 802.11b. The default is Auto.
Tx Rate Limiting (11g clients). This option provides rate limiting on Wireless-G connections. Wireless-G clients
can be limited to data rates specified by IEEE 802.11g and 802.11b. The default is Auto.
Tx Rate Limiting (11n clients). This option provides rate limiting on Wireless-N connections. Wireless-N clients
can be limited to data rates specified by draft IEEE 802.11n, IEEE 802.11g, and 802.11b. The data rate associated
with each MCS number (0-15) changes according to your selection on Channel Bandwidth and Guard Interval.
The default is Auto.
CTS Protection Mode. CTS (Clear-To-Send) Protection Mode function boosts the Wireless Router’s ability to
catch all wireless transmissions, but will severely decrease performance. Keep the default setting, Auto, so the
Wireless Router can use this feature as needed, when the Wireless-N/G products are not able to transmit to the
Wireless Router in an environment with heavy 802.11b traffic. Select Disabled if you want to permanently disable
this feature.
WMM. Wi-Fi Multimedia is a QoS feature defined by WiFi Alliance before IEEE 802.11e was finalized. Now it is
part of IEEE 802.11e. When it is enabled, it provides four priority queues for different types of traffic. It
automatically maps the incoming packets to the appropriate queues based on QoS settings (in IP or layer 2
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header). WMM provides the capability to prioritize traffic in your environment. The default in Enabled. Select
High Performance (N-Only) if you want to achieve highest throughput on 11n connections. Note that 11b and
11g clients performance will be affected by setting to this mode.
IOT Mode. Interoperability Mode. Enabling this mode will help this AP to communicate with Linksys retail client
cards (e.g. WPC300N) at 11n rates. This mode is a temporary measure to cope with implementation differences
on 802.11n draft specification. This option will be removed eventually when IEEE802.11n is finalized. The default
is disabled.
Beacon Interval. This value indicates the frequency interval of the beacon. A beacon is a packet broadcast by
the Wireless Router to keep the network synchronized. A beacon includes the wireless networks service area, the
Wireless Router address, the Broadcast destination addresses, a time stamp, Delivery Traffic Indicator Maps, and
the Traffic Indicator Message (TIM). The default is 100 ms.
DTIM Interval. This value indicates how often the Wireless Router sends out a Delivery Traffic Indication
Message (DTIM). Lower settings result in more efficient networking, while preventing your PC from dropping into
power-saving sleep mode. Higher settings allow your PC to enter sleep mode, thus saving power, but interferes
with wireless transmissions. The default is 1 ms.
RTS Threshold. This setting determines how large a packet can be before the Wireless Router coordinates
transmission and reception to ensure efficient communication. This value should remain at its default setting of
2347. If you encounter inconsistent data flow, only minor modifications are recommended.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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Firewall Tab
The Firewall Tab allows you to configure software security features like SPI (Stateful Packet Inspection) Firewall,
IP based Access List, restriction LAN users on Internet (WAN port) access, and NAPT (Network Address Port
Translation) Settings (only works when NAT is enabled) to limited services to specific ports.
Note that for WAN traffic, NAPT settings are applied first, then it will pass the SPI Firewall settings, followed by IP
based Access List (which requires more CPU power).
Basic Settings
Firewall: SPI (Stateful Packet Inspection) Firewall, when you enable this feature, the Router will perform deep
packet inspection on all the traffic going through the Router and drop the packets that do not follow the
pre-defined protocol behavior. The default is Enable.
DoS Protection: When enabled, the Router will prevent DoS (Denial of Service) attacks coming in from the
Internet. DOS attacks are making your Router’s CPU busy such that it cannot provide services to regular traffic.
The default Is Enable.
Figure 6-29: Firewall - Basic Settings
Block WAN Request: When enabled, the Router will ignore PING Request from the Internet so it seems to be
hidden. The default is Enable.
Remote Management: When enabled, the Router will allow the Web-based Utility to be accessed from the
Internet. The default is Disable.
HTTPS: This option is only useful when Remote Management is enabled. When enabled, the Web based Utility
can be accessed only through HTTPS session from WAN side instead of regular HTTP. This will have your remote
Web session protected by SSL encryption algorithms. The default is Enable.
Multicast Pass-through: When enabled, the Router will allow IP Multicast traffic to come in from the Internet.
The default is Disable.
MTU: Set your data packet maximum size at the IP layer manually or automatically from negotiation. The
maximum size on Ethernet is 1500 bytes. The default is auto.
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Restrict WEB Features
Block. Select the Web features that you wish to restrict. All those features could place security concern to your
PCs on the LAN side. You have to balance your needs on those applications and security. The default is
unselected.
• Java: Java is a programming language for websites. If you deny Java, you run the risk of not having
access to Internet sites created using this programming language.
• Cookies: A cookie is data stored on your PC and used by Internet sites when you interact with them, so
you may not want to deny cookies.
• ActiveX: ActiveX is a Microsoft (Internet Explorer) programming language for websites. If you deny
ActiveX, you run the risk of not having access to Internet sites using this programming language. Also,
Windows Update uses ActiveX, so if this is blocked, Windows update will not work.
• Proxy: If local users have access to WAN proxy servers, they may be able to circumvent the Router's
content filters and access Internet sites blocked by the Router. Denying Proxy will block access to any
WAN proxy servers.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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IP Based ACL
This screen shows a summary of configured IP based Access List. The Access List is used to restrict traffic going
through the Router either from WAN or LAN port. There are two ways to restrict data traffic. You can block specific
types of traffic according to your ACL definitions. Or you can allow only specific types of traffic according to your
ACL definition. The ACL rules will be read according to its priority. If there is a match for a packet, the action will
be taken and following lower priority rules will not be checked against this packet.
Note that the higher the number of rules that need to be checked against packets, the lower the throughput. Use
ACL rules with caution.
There are two default rules in the table that cannot be deleted. The first rule will allow all traffic coming in from
LAN port to pass the Router. The second rule will allow all traffic coming in from WAN port. These two rules have
the lowest priority, so without adding any user defined rules, all the packets can be passed through from both
WAN and LAN sides.
Figure 6-30: Firewall - IP Based ACL
The rule will be enabled when the Enable button is checked, and when Date and Time are matched. If any of
conditions are not met, the rule will not be used to check against packets.
The following are descriptions on each of the fields in the ACL Table:
Priority: This defines the order on which rule is checked against first. The smaller number has higher priority.
The default rules will always be checked last.
Enable: This tells the Router if the rule is active or not. You can have rules defined in the ACL Table but in an
inactive state. The administrator can decide on when to enable specific ACL rules manually.
Action: This defines how the rule is to affect the traffic. It can be either Allow or Deny. If the rule is matched and
the action is Allow, the packet will be forwarded. If the rule is matched and the action is Deny, the packet will be
dropped.
Service: You can either select one of the pre-defined services in the drop-down menu or you can define new
services by clicking the Service Management button. Once you defined your own service, it will be listed on the
top of the drop-down menu. You can also select ALL to allow or block all types of IP traffic.
The User-defined Service GUI page can be either accessed from the New Rule screen by clicking Service
Management button, or you can access it directly from the 2nd layer tab under Firewall.
Figure 6-31: Firewall - IP Based ACL
(pre-defined services)
Source Interface: Select LAN, WAN, or ANY interface.
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Source: This is the source IP address to be matched against. You can define a Single IP address, a Range of IP
addresses (start IP and end IP), a Network (IP Prefix and Network Mask), or ANY IP addresses.
Destination: This is the destination IP address to be matched against. You can define a Single IP address, a
Range of IP addresses (start IP and end IP), a Network (IP Prefix and Network Mask), or ANY IP addresses.
Time: Displays the time period this rule will be enabled (used together with Date). It can be set to Any Time.
Date: Displays the days in a week this rule will be enabled (used together with Time). It can be set to Any Day.
Edit button: Use this button to go to Edit IP ACL Rule screen and modify this rule.
Delete button: Use this button to delete the ACL rule from the list.
Following is a description of the buttons in the IP Based ACL screen:
Page Selections: You can select specific page of ACL list from the drop-down menu to be displayed. Or you can
navigate them page by page through Previous Page and Next Page button.
Figure 6-32: Firewall - IP Based ACL (Service
definition)
Add New Rule: Click this button to enter the page to define a new ACL rule.
Disable All Rule: Click this page to disable all the user defined rules.
Delete All Rule: Click this page to delete all the user defined rules.
Edit IP ACL Rule
This Web page can be entered only through IP Based ACL Tab. You can enter this page by clicking Add New Rule
button on that page.
New Rule
Action: Select either Allow or Deny. Default is Allow.
Service: Select ALL or pre-defined (or user-defined) services from the drop-down menu.
Figure 6-33: Firewall - Edit IP ACL Rule
Log: If checked, this ACL rule will be logged when a packet match happens.
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Log Prefix: This string will be attached in front of the log for the matched event.
Source Interface: Select LAN, WAN, or ANY interface.
Source: The source IP address to be matched against. You can define a Single IP address, a Range of IP
addresses (start IP and end IP), a Network (IP Prefix and Network Mask), or ANY IP addresses.
Destination: The destination IP address to be matched against. You can define a Single IP address, a Range of IP
addresses (start IP and end IP), a Network (IP Prefix and Network Mask), or ANY IP addresses.
Service Management Button: Click this button and the Service Tab to add new service type to the Service
drop-down menu.
Scheduling
Time: Enter the time period this rule will be applied (used together with Date). It can be set to Any Time.
Date: Enter the days in a week this rule will be applied (used together with Time). It can be set to Any Day.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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Internet Access Policy
Access to the Internet can be managed by policies. A policy consists of four components. You need to define the
PCs (MAC or IP address) to apply this policy, either Deny or Allow Internet service, what time and date to enable
this policy, and what URLs or Keywords to apply this policy.
Use the settings on this screen to establish an access policy. Selecting a policy from the drop-down menu will
display that policy's settings. You can then perform the following operations:
• Create a Policy - see instructions below.
• Delete the current policy - click the Delete button.
• View all policies - click the Summary button. On the Summary screen, the policies are listed with the
following information: No., Policy Name, Days, Time, and a checkbox to delete (clear) the policy. To delete
a policy, check the checkbox in the Delete column, and click the Delete button
• View or change the PCs covered by the current policy - click the Edit List of PCs button.
On the List of PCs screen, you can define PCs by MAC Address or IP Address. You can also enter a range of IP
Addresses if you want this policy to affect a group of PCs.
To create an Internet Access policy:
1. Select the desired policy number from the Internet Access Policy drop-down menu.
2. Enter a Policy Name in the field provided.
3. To enable this policy, select the Enable option.
Figure 6-34: Firewall - Internet Access Policy
4. Click the Edit List of PCs button to select which PCs will be affected by the policy. The List of PCs screen will
appear in a sub-window. You can select a PC by MAC Address or IP Address. You can also enter a range of IP
Addresses if you want this policy to affect a group of PCs. After making your changes, click the Save Settings
button to apply your changes.
5. Click the appropriate option, Deny or Allow, depending on whether you want to block or allow Internet access
for the PCs you listed on the List of PCs screen.
6. Decide what Days and what Times you want this policy to be enforced. Select the individual days during
which the policy will be in effect, or select Everyday. Enter a range of hours and minutes during which the
policy will be in effect, or select 24 Hours.
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7. If you wish to block access to Web sites, use the Website Blocking by URL Address or Website Blocking
by Keyword feature.
• Website Blocking by URL Address. Enter the URL or Domain Name of the web sites you wish to block.
• Website Blocking by Keyword. Enter the keywords you wish to block in the fields provided. If any of
these Keywords appears in the URL of a web site, access to the site will be blocked. Note that only the
URL is checked, not the content of each Web page.
8. Click the Save Settings button to save the policy settings.
Figure 6-35: Firewall - Internet Access Policy
Summary
Figure 6-36: Firewall - Internet Access Policy
(List of PCs to apply policy)
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Single Port Forwarding
This is one of the NAPT (Network Address Port Translation) feature. Use the Single Port Forwarding screen when
you want to open specific services (that use single port). This allows users on the Internet to access this server
by using the WAN port address and the matched external port number. When users send these types of request to
your WAN port IP address via the Internet, the NAT Router will forward those requests to the appropriate servers
on your LAN.
Application Name. Enter the name of the application you wish to configure.
External Port. This is the port number used by the service or Internet application. Internet users must connect
using this port number. Check with the software documentation of the Internet application for more information.
Internal Port. This is the port number used by the Router when forwarding Internet traffic to the PC or server on
your LAN and is usually the same as the External Port number. If it is different, the Router performs a Port
Translation, so that the port number used by Internet users is different from the port number used by the server or
Internet application.
For example, you could configure your Web Server to accept connections on both port 80 (standard) and port
8080. Then, enable Port Forwarding, set the External Port to 80 and the Internal Port to 8080. Now, any traffic
from the Internet to your Web server will be using port 8080, even though the Internet users used the standard
port, 80. (Users on the local LAN can and should connect to your Web Server using the standard port 80.)
Figure 6-37: Firewall - Single Port Forwarding
Protocol. Select the protocol used for this application, TCP and/or UDP.
IP Address. For each application, enter the IP address of the PC running the specific server application.
Enabled. Select Enabled to enable port forwarding for the relevant server application.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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Port Range Forwarding
This is one of the NAPT (Network Address Port Translation) features. The Port Range Forwarding screen allows
you to set up public services on your network, such as web servers, ftp servers, e-mail servers, or other
specialized Internet applications that use one or multiple port numbers (e.g. video conference). The port numbers
being used will not change while forwarding to the local network. This allows users on the Internet to access this
server by using the WAN port IP address and the pre-defined port numbers. When users send these types of
requests to your WAN port IP address via the Internet, the NAT Router will forward those requests to the
appropriate servers on your LAN.
Application. Enter the name of the application you wish to configure.
Start. This is the beginning of the port range. Enter the beginning of the range of port numbers (external ports)
used by the server or Internet application. Check with the software documentation of the Internet application for
more information if necessary.
Figure 6-38: Port Range Forwarding
End. This is the end of the port range. Enter the end of the range of port numbers (external ports) used by the
server or Internet application. Check with the software documentation of the Internet application for more
information if necessary.
Protocol. Select the protocol(s) used for this application, TCP and/or UDP.
IP Address. For each application, enter the IP address of the PC running the specific application.
Enabled. Select Enabled to enable port range forwarding for the relevant application.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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Port Range Triggering
This is one of the NAPT (Network Address Port Translation) feature. Port Range Triggering is used for special
applications that can request a port to be opened on demand. For this feature, the Wireless Router will watch
outgoing packets for specific port numbers. This will trigger the Wireless Router to allow the incoming packets
within the specified forwarding range and forward those packets to the triggering PC. One of the example
applications is QuickTime. It would use port 1000 for outgoing packets and 2000 for incoming packets.
Application Name. Enter the name of the application you wish to configure.
Triggered Range. For each application, list the triggered port number range. These are the ports used by
outgoing traffic. Check with the Internet application documentation for the port number(s) needed. In the first
field, enter the starting port number of the Triggered Range. In the second field, enter the ending port number of
the Triggered Range.
Forwarded Range. For each application, list the forwarded port number range. These are the ports used by
incoming traffic. Check with the Internet application documentation for the port number(s) needed. In the first
field, enter the starting port number of the Forwarded Range. In the second field, enter the ending port number of
the Forwarded Range.
Figure 6-39: Port Range Triggering
Enabled. Select Enabled to enable port range triggering for the relevant application.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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Service
This screen allows users to define new service types based on TCP or UDP. The new service will be added to the
summary table below. It will also show up in the service drop-down menu under Edit IP ACL Rule screen.
Name: Define the new service name. The service name must be different from existing pre-defined or
user-defined services.
Type: The service can rely on UDP only, TCP only, or both UDP and TCP.
Start Port: Enter the starting port number.
Finish Port: Enter the finishing port number. The finishing port number must be greater or equal to starting port
number.
Save button: Click this button to save a new defined service.
Delete button: To delete an existing service, click the Edit button at the end of each row in the summary table.
Figure 6-40: Firewall - Services
Edit button: Use this button to select a service to modify or delete.
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VPN Tab
IPsec VPN
Use this screen to create VPN tunnels between the Router to the remote Router. All Linksys Routers with IPsec
VPN support can be used as a remote Router (e.g. RVS4000, WRV54G, RV042). The Router supports VPN tunnels
using IPsec (IP Security) technologies. You can create, delete, or modify a VPN tunnel on this page.
Select Tunnel Entry. Select a tunnel to configure or create a new tunnel.
Delete Button. Click this button to delete the selected tunnel.
Summary Button. Clicking this button shows the settings of all existing tunnels.
IPsec VPN Tunnel. Select Enable to enable this tunnel.
Tunnel Name. Enter a name for this tunnel, such as “Anaheim Office”.
Local Security Group
Local Security Group Type. Select the local LAN user(s) behind the Router that can use this VPN tunnel. This
may be a single IP address or Sub-network. Notice that the Local Security Group must match or cover the other
router's Remote Security Group.
Figure 6-41: VPN - IPsec VPN
IP Address. Enter the IP address on the local network.
Subnet Mask. If the Subnet option is selected, enter the mask to determine the IP prefix on the local network.
Remote Security Group
Remote Security Group. Select the remote LAN user(s) behind the remote gateway who can use this VPN tunnel.
This may be a single IP address, a Sub-network, or any addresses. If Any is set, the Router acts as responder and
accepts request from any remote user. Notice that the Remote Security Group must match or cover the other
Router's Local Security Group.
Figure 6-42: VPN Tunnel Summary
IP Address. Enter the IP address on the remote network.
Subnet Mask. If the Subnet option is selected, enter the mask to determine the IP prefix on the remote network.
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Remote Security Gateway. Select the remote gateway WAN port IP Address that can use this VPN tunnel. This
may be a Single IP address or Any addresses. If is set, the Router acts as responder and accepts request from any
remote Gateway.
IP Address. Enter the IP address on the remote WAN port.
Key Management
Key Exchange Method. The Router supports both automatic and manual key management. When choosing
automatic key management, IKE (Internet Key Exchange) protocols are used to negotiate key material for SA
(Security Association). If manual key management is selected, no key negotiation is needed. Basically, manual
key management is used in small static environments or for troubleshooting purpose. Notice that both sides must
use the same Key Management method (both Auto or both Manual). For Manual key management, all the
configurations need to match on both sides.
Auto IKE
Encryption. The Encryption method determines the complexity to encrypt/decrypt data packets. Only 3DES is
supported. Notice that both sides must use the same Encryption method.
Authentication. Authentication determines a method to authenticate the data packets to make sure they
come from a trusted source. Either MD5 or SHA1 may be selected. Notice that both sides (VPN endpoints)
must use the same Authentication method.
• MD5: A one way hashing algorithm that produces a 128-bit digest.
• SHA1: A one way hashing algorithm that produces a 160-bit digest.
PFS (Perfect Forward Secrecy). If PFS is enabled, IKE Phase 2 negotiation will generate a new key material
for IP traffic encryption and authentication. Note: that both sides must have this selected.
Pre-Shared Key. IKE uses the Pre-shared Key field to authenticate the remote IKE peer. Both characters and
hexadecimal values are acceptable in this field. e.g. “My_@123” or “0x4d795f40313233” Note that both
sides must use the same Pre-shared Key.
Key Life Time. This field specifies the lifetime of the IKE generated key. If the time expires, a new key will be
renegotiated automatically. The Key Life Time may range from 300 to 100,000,000 seconds. The default Life
Time is 3600 seconds.
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Manual
Encryption Algorithm. The Encryption method determines the complexity to encrypt/decrypt data packets.
Only 3DES is supported. Notice that both sides must use the same Encryption method.
Encryption Key. This field specifies a key used to encrypt and decrypt data packets. Both characters and
hexadecimal values are acceptable in this field. Note: that both sides must use the same Encryption Key.
Authentication Algorithm. Authentication determines a method to authenticate the data packets to make
sure they come from a trusted source. Either MD5 or SHA1 may be selected. Notice that both sides (VPN
endpoints) must use the same Authentication method.
• MD5: A one way hashing algorithm that produces a 128-bit digest.
• SHA1: A one way hashing algorithm that produces a 160-bit digest.
Authentication Key. This field specifies a key used to authenticate IP traffic. Both characters and
hexadecimal values are acceptable in this field. Note: that both sides must use the same Authentication Key.
Inbound SPI/Outbound SPI. The SPI (Security Parameter Index) is carried in the IPsec ESP header. This
enables the receiver to select the SA (Security Association), under which a packet should be processed. The
SPI is a 32-bit value. Both decimal and hexadecimal values are acceptable. e.g. “987654321” or
“0x3ade68b1”. Each tunnel must have unique an Inbound SPI and Outbound SPI. No two tunnels share the
same SPI. Notice that Inbound SPI must match the other Router's Outbound SPI, and vice versa.
Status
Status. This field shows the connection status for the selected tunnel. The state is either connected or
disconnected.
Connect button. Use this to establish a connection for the current VPN tunnel. If you have made any changes,
click Save Settings to first apply your changes.
Disconnect button. Use this to break a connection for the current VPN tunnel.
View Log button. Click this to view the VPN log, which shows details of each tunnel established. You can change
the Log type to show only VPN tunnel related events.
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Figure 6-43: View VPN Tunnel Log
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Advanced Settings button. If the Key Exchange Method is Auto (IKE), this button provides access to some
additional settings relating to IKE. Use this if the Router is unable to establish a VPN tunnel to the remote VPN
Gateway; ensure the Advanced Settings match those on the remote VPN Gateway. Note that Phase 1 is used for
key negotiation and Phase 2 is used for actual data exchange.
Advanced Settings (Phase 1 and Phase 2)
Operation Mode. Select the method to match the remote VPN endpoint.
• Main: Main Mode is slower but more secure.
• Aggressive: Aggressive mode is faster but less secure.
Local Identity. Select the desired option to match the “Remote Identity” setting at the other end of this
tunnel.
Figure 6-44: IPsec VPN Advanced Settings
• Local IP address: Your WAN IP Address.
• Name: Your domain name.
Remote Identity. Select the desired option to match the “Local Identity” setting at the other end of this
tunnel.
• Local IP address: WAN IP Address of the remote VPN endpoint.
• Name: Domain name of the remote VPN endpoint.
Encryption. Encryption Algorithm used for the IKE SA. This setting must match the setting used at the other
end of this tunnel.
Authentication. Authentication Algorithm used for the IKE SA. This setting must match the setting used at the
other end of this tunnel.
• MD5: A one way hashing algorithm that produces a 128-bit digest.
• SHA1: A one way hashing algorithm that produces a 160-bit digest.
Group. The Group setting determines the bit size used in the IKE exchange. This value must match the value
used at the other end of this tunnel.
Key Life Time. This determines the time interval before the IKE SA (Security Association) expires. (It will
automatically be re-established if necessary.) While using a short time period increases security, it also
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degrades performance. While this unit is in seconds, it is common to use periods over an hour (3600 seconds)
for the SA Life Time.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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VPN Client Accounts
You can allow remote users to easily establish a VPN connection to your Router using the Linksys QuickVPN client
utility without using a compatible VPN Router with IPsec VPN settings. This is achieved by creating user accounts
on the Router and authenticate users through Username and Password. After creating user accounts, it will be
summarized in the table below.
For users using QuickVPN, it will first establish an SSL connection with remote Wireless Router to get
authenticated. Then QuickVPN will automatically negotiate IPsec settings with the remote Router. All the data
packets will be encrypted using IPsec thereafter.
The Wireless Router supports up to five Linksys QuickVPN clients by default. Additional QuickVPN Client licenses
can be purchased separately.
Username. Enter the username using any combination of keyboard characters.
Figure 6-45: VPN - VPN Client Accounts
Password. Enter the password you would like to assign to this user.
Re-enter to Confirm. Retype the password to ensure that it has been entered correctly.
Allow User to Change Password. This option determines whether the user is allowed to change their password.
VPN Client List Table
No. Displays the user number.
Active. When checked, the designated user can connect, otherwise the VPN client account is disabled.
Username. Displays the username.
Edit button. This button is used to modify the username, password, or toggle between whether the user is
allowed to change their password.
Remove button. This button is used to delete a user account.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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VPN Passthrough
This screen allows users to use their own VPN algorithms to connect to their remote Routers. The Wireless Router
will just pass the traffic through.
IPsec Passthrough. Internet Protocol Security (IPsec) is a suite of protocols used to implement secure exchange
of packets at the IP layer. IPsec Passthrough is enabled by default to allow IPsec tunnels to pass through the
Router. To disable IPsec Passthrough, select Disabled.
PPTP Passthrough. Point-to-Point Tunneling Protocol (PPTP) allows the Point-to-Point Protocol (PPP) to be
tunneled through an IP network. PPTP Passthrough is enabled by default. To disable PPTP Passthrough, select
Disabled.
L2TP Passthrough. Layer 2 Tunneling Protocol is the similar to PPP but allows Layer 2 and the PPP session to
terminate at different servers or locations. L2TP Passthrough is enabled by default. To disable L2TP Passthrough,
select Disabled.
Figure 6-46: VPN - VPN Passthrough
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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QoS Tab
QoS (Quality of Service) allows you to prioritize network traffic using either Application-based priority (such as
Web browsing applications, FTP applications, etc.) or Port-based priority, which allows you to assign priorities to
the four physical network ports. Higher priority traffic will be allocated more bandwidth, which results in lower
latency (or delay).
Application-based
The Application-based QoS controls priority differentiation for data packets between LAN (including WLAN) and
WAN ports. Application-based QoS is achieved by software running on the CPU so it cannot control traffic
between LANs that are switched directly by a hardware switch chipset.
Application-based QoS. QoS (Quality of Service) is disabled by default. When enabled, this option allows you to
assign priority based on the application type.
Set Internet Bandwidth. Enter approximate bandwidth number for your WAN connection. This will help the
software-based algorithm to allocate bandwidth to different priorities.
Figure 6-47: QoS - Application Based
Table 1: Application-based QoS
Application
Name
Port(s)
Primary Use
FTP
TCP Port 20
FTP (File Transfer Protocol) is used for transferring files over the Internet.
HTTP
TCP Port 80
HTTP (HyperText Transfer Protocol) is used for browsing the Internet.
Telnet
TCP Port 23
Telnet is a client-server protocol used to communicate over a network or
the Internet.
SMTP
TCP Port 25
SMTP (Simple Mail Transfer Protocol) is used for sending e-mail.
POP3
TCP Port 110
POP3 (Post Office Protocol version 3) is used for retrieving e-mail.
Specific Port
User Defined
User Defined (0-65535)
IMPORTANT: If you don’t assign different priorities to applications, there will be
no differentiation between different traffic types.
• Select the desired option for each application: High priority, Medium priority, or Low priority.
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Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
Port-based
Port-based QoS is implemented in hardware so it can achieve better throughput. It can only control traffic among
the four LAN ports.
LAN ports 1-4 can be assigned High, Medium, Normal, or Low priority. Lower priority traffic will be slowed down
to allow greater throughput for higher priority traffic.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
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Figure 6-48: Port-based
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Administration Tab
Management
Local Gateway Access
This configures the administrator user accounts to manage the Wireless Router through Web based Utility. Only
the first user is created by default. Other accounts are not created by default so you can leave them alone. Make
sure to change the first user account username and password when you configure your Wireless Router for the
first time.
Gateway Userlist. Select a user to configure from the drop-down menu.
Gateway Username. Enter the user name here.
Gateway Password. Enter the password.
Re-enter to Confirm. Retype the password in this field.
Figure 6-49: Administration - Management
SNMP
This configures the Simple Network Management Protocol settings. Users can use management software to read
or write information from or to the device.
Device Name. Enter a suitable name. This name will be used to identify this device, and will be displayed by your
SNMP software.
SNMP. Select Enable if you wish to use SNMP. To use SNMP, you need SNMP software on your PC.
Read Community. Enter the SNMP community name for SNMP “Get” commands.
Write Community. Enter the SNMP community name for SNMP “Set” commands.
Trap To. Enter the IP Address of the SNMP Manager where traps will be sent. If desired, this may be left blank.
UPnP. Universal Plug and Play allows Windows MP and XP to automatically configure the Internet Gateway on its
routing table. If you want to use UPnP, keep the default setting, Enable. Otherwise, select Disable.
IGMP Proxy. IGMP (Internet Group Membership Protocol) Proxy can facilitate the communication between IGMP
clients and IGMP Routers. Enable this feature if you are using IP multicast services in your network.
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Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
Log
This screen provides you options on how you want to manage your system logs. The Wireless Router provides
four categories of event logging (Firewall, VPN, System, and ACL). You can configure the Wireless Router to send
the event log to you through e-mail, upload the log to syslog server, or view the log locally on the Wireless Router.
Email Alerts. If enabled, an e-mail will be sent when the number of DoS events exceeds the defined threshold or
the total events number exceed 100. If enabled, the e-mail address information (below) must be provided.
Denial of Service Thresholds. Enter the number of DoS (Denial of Service) attacks that need to be detected (and
blocked) by the software firewall before an e-mail alert is sent. The minimum value is 20, the maximum value is
100. Note that if IPS has been enabled, IPS would block DoS attacks before they reach the firewall. In that case,
please check the IPS Report to know event details.
SMTP Mail Server. Enter the address (domain name) or IP address of the SMTP (Simple Mail Transport Protocol)
server you use for outgoing e-mails.
Email Address for Alert Logs. Enter the e-mail address the log is to be sent to.
Figure 6-50: Administration - Log
Return Email Address. The e-mail will show this address as the sender's address.
Enable Syslog. Select Enable if you want to use this feature.
Syslog Server. Enter the IP Address in the Syslog Server field when Enable Syslog is checked.
Local Log. Enable this if you want to see the log locally on the Wireless Router.
View Log button. If Local Log is enabled, click View Log to view the event log on the Wireless Router.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
Figure 6-51: View Log pop-up window
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Diagnostics
Ping Test Parameters
Ping Target IP. Enter the IP address or URL that you want to ping.
Ping Size. Enter the size of the packet you want to use.
Number of Pings. Enter the number of times you wish to ping the target device.
Ping Interval. Enter the time period (in milliseconds) between each ping.
Ping Timeout. Enter the desired time period (in milliseconds). If a response is not received within the defined
ping period, the ping is considered to have failed.
Start Test button. Click this button to begin the test. A new screen will appear and display the test results. A
summary of the PING results will be shown on the bottom of this screen.
Figure 6-52: Administration - Diagnostics
Ping Result. It displays the Ping status.
Traceroute Test Parameters
TraceRoute Target. Enter the IP address or Host name to perform the traceroute testing.
Start Test button. Click this button to begin the test. A new screen will appear and display the test results.
Figure 6-53: Ping Test Screen
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Config Management
Save Configuration
Save Configuration to File button. Click this button to save your Wireless Router’s current configuration to a file
on your PC. Enter the file name on the Windows screen that appears.
Restore Configuration
Select a previously saved configuration file to restore the configuration to the Wireless Router. This could be
helpful if you want to use the same configuration on a new hardware or after resetting to the factory defaults. You
can either enter the file path name yourself or use the Browse button to select a file from the Windows file
system.
Figure 6-54: Trace Route Test Screen
Browse button. Click this button to select a previously saved configuration from the Windows file system.
Load button. Click this button to start the restoration process.
Figure 6-55: Administration - Config
Management
Chapter 6: Setting Up and Configuring the Router
Administration Tab
70
Wireless-N Gigabit Security Router with VPN
Factory Defaults
Restore Factory Defaults. Click this button to reset all configuration settings to their default values. All settings
that have been saved will be lost when the default settings are restored. After clicking the button, another screen
will appear. Click OK to continue. Another screen will appear while the system reboots.
Figure 6-56: Administration - Factory Default
Reboot
Reboot. Click this button to reboot the whole system remotely. After clicking the button, another screen will
appear. Click OK to continue. Another screen will appear while the system reboots.
Figure 6-57: Administration - Reboot
Firmware Upgrade
To upgrade firmware, download the latest firmware for the product from Linksys.com, extract it to your computer,
and perform the steps below:
1. File. Type in the name of the extracted firmware upgrade file or click Browse to locate the file from the file
system.
2. Start to Upgrade. Once you have selected the appropriate file, click the Start to Upgrade button and follow
the on-screen instructions to upgrade your firmware.
Figure 6-58: Administration - Firmware
Upgrade
Chapter 6: Setting Up and Configuring the Router
Administration Tab
71
Wireless-N Gigabit Security Router with VPN
IPS Tab
The Wireless Router supports advanced Intrusion Prevention Systems (IPS), which is an integral part of the
self-defending strategy. It allows you to stay current on the latest threats so that malicious or damaging traffic is
accurately identified, classified, and stopped in realtime. You can use IPS together with Firewall, IP based ACL,
and IPsec VPN to achieve maximum securities. The IPS is hardware-accelerated on this Wireless Router.
Configure IPS functions on this screen after enabling IPS.
Configuration
IPS Function. Enable or Disable the IPS Function as desired.
Abnormally Detection
Figure 6-59: IPS - Configuration
• HTTP. Web attacks use weaknesses on HTTP protocol to trigger the buffer overflow on Web servers. The
default is Disable.
• FTP. FTP attacks use weaknesses on FTP protocol to generate illegal FTP commands to the FTP server.
The default is Disable.
• TELNET. Telnet attacks use weakness on TELNET protocol to execute illegal commands on the TELNET
server. The default is Disable.
• RPC. Remote Procedure Call allows attackers to issue illegal commands to be executed on RPC server.
The default is Disable
Signature Update. To protect your local network from the latest Internet threats, you are encouraged to upgrade
the IPS Signature file bi-weekly. First, you need to download the Signature file from www.linksys.com to your PC.
Then you can select this file by clicking the Browse button. Use the Upgrade button to start an upgrade.
Browse button. Enter the path name of the new signature file In the field provided, or click the Browse button to
find this file from your Windows file system.
Update button. After you have selected the file, click this button to start an upgrade.
Change these settings as described here and click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes. Help information is displayed on the right-hand side of the screen, and click
More for additional details.
Chapter 6: Setting Up and Configuring the Router
IPS Tab
72

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