LINKSYS WRT54G2V1 Wireless-G Broadband Router User Manual Manual Part 4
LINKSYS LLC Wireless-G Broadband Router Manual Part 4
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Contents
Manual Part 4
Chapter 3 Advanced Configuration
12
Wireless-G Broadband Router
Passphrase Enter a Passphrase to automatically generate
WEP keys. Then click Generate.
Key 1-4 If you did not enter a Passphrase, enter the WEP
key(s) manually.
WEP
WEP is a basic encryption method, which is not as secure
as WPA.
Security Mode > WEP
Default Transmit Key Select a Default Transmit Key
(choose which Key to use). The default is 1.
WEP Encryption Select a level of WEP encryption, 64 bits
10 hex digits or 128 bits 26 hex digits. The default is
64 bits 10 hex digits.
Passphrase Enter a Passphrase to automatically generate
WEP keys. Then click Generate.
Key 1-4 If you did not enter a Passphrase, enter the WEP
key(s) manually.
Click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes.
Wireless > Wireless MAC Filter
Wireless access can be filtered by using the MAC addresses
of the wireless devices transmitting within your network’s
radius.
Wireless > Wireless MAC Filter
Wireless MAC Filter
Wireless MAC Filter
To filter wireless users by MAC Address,
either permitting or blocking access, click Enable. If you do
not wish to filter users by MAC Address, keep the default
setting, Disable
.
Prevent Select this to block wireless access by MAC
Address. This button is selected by default.
Permit Only Select this to allow wireless access by MAC
Address. This button is not selected by default.
Edit MAC Filter List
Click this to open the MAC Address
Filter List screen. On this screen, you can list users, by MAC
Address, to whom you wish to provide or block access. For
easy reference, click Wireless Client MAC List to display a list
of network users by MAC Address
.
MAC Address Filter List
Click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes.
Wireless > Advanced Wireless Settings
This Wireless > Advanced Wireless Settings screen is used
to set up the Router’s advanced wireless functions. These
settings should only be adjusted by an expert administrator
as incorrect settings can reduce wireless performance.
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Wireless-G Broadband Router
Wireless > Advanced Wireless Settings
Advanced Wireless
Authentication Type The default is set to Auto, which
allows either Open System or Shared Key authentication
to be used. With Open System authentication, the sender
and the recipient do NOT use a WEP key for authentication.
With Shared Key authentication, the sender and recipient
use a WEP key for authentication.
Basic Rate The Basic Rate setting is not actually one rate
of transmission but a series of rates at which the Router
can transmit. The Router will advertise its Basic Rate to the
other wireless devices in your network, so they know which
rates will be used. The Router will also advertise that it will
automatically select the best rate for transmission. The
default setting is Default, when the Router can transmit
at all standard wireless rates (1-2Mbps, 5.5Mbps, 11Mbps,
18Mbps, and 24Mbps). Other options are 1-2Mbps, for
use with older wireless technology, and All, when the
Router can transmit at all wireless rates. The Basic Rate
is not the actual rate of data transmission. If you want to
specify the Router’s rate of data transmission, configure
the Transmission Rate setting.
Transmission Rate The rate of data transmission should
be set depending on the speed of your wireless network.
You can select from a range of transmission speeds, or you
can select Auto to have the Router automatically use the
fastest possible data rate and enable the Auto-Fallback
feature. Auto-Fallback will negotiate the best possible
connection speed between the Router and a wireless
client. The default value is Auto.
CTS Protection Mode CTS (Clear-To-Send) Protection
Mode should remain disabled unless you are having severe
problems with your Wireless-G products not being able
to transmit to the Router in an environment with heavy
802.11b traffic. This function boosts the Router’s ability
to catch all Wireless-G transmissions but will severely
decrease performance.
Frame Burst Enabling this option should provide your
network with greater performance, depending on the
manufacturer of your wireless products. To turn on the
Frame Burst option, select Enable. The default is Disable.
Beacon Interval The default value is 100. Enter a value
between 1 and 65,535 milliseconds. The Beacon Interval
value indicates the frequency interval of the beacon. A
beacon is a packet broadcast by the Router to synchronize
the wireless network.
DTIM Interval This value, between 1 and 255, indicates
the interval of the Delivery Traffic Indication Message
(DTIM). A DTIM field is a countdown field informing
clients of the next window for listening to broadcast
and multicast messages. When the Router has buffered
broadcast or multicast messages for associated clients, it
sends the next DTIM with a DTIM Interval value. Its clients
hear the beacons and awaken to receive the broadcast
and multicast messages. The default value is 1.
Fragmentation Threshold This value specifies the
maximum size for a packet before data is fragmented
into multiple packets. If you experience a high packet
error rate, you may slightly increase the Fragmentation
Threshold. Setting the Fragmentation Threshold too low
may result in poor network performance. Only minor
reduction of the default value is recommended. In most
cases, it should remain at its default value of 2346.
RTS Threshold Should you encounter inconsistent data
flow, only minor reduction of the default value, 2347, is
recommended. If a network packet is smaller than the
preset RTS threshold size, the RTS/CTS mechanism will
not be enabled. The Router sends Request to Send (RTS)
frames to a particular receiving station and negotiates
the sending of a data frame. After receiving an RTS, the
wireless station responds with a Clear to Send (CTS) frame
to acknowledge the right to begin transmission. The RTS
Threshold value should remain at its default value of
2347.
AP Isolation This isolates all wireless clients and wireless
devices on your network from each other. Wireless devices
will be able to communicate with the Router but not with
each other. To use this function, select On. AP Isolation is
turned Off by default.
SecureEasySetup This feature allows you to enable or
disable the SecureEasySetup feature. Select Disabled to
disable the feature and turn off the button’s light. The
feature is Enabled by default.
Click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes.
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Wireless-G Broadband Router
Security > Firewall
The Security > Firewall screen is used to configure a firewall
that can filter out various types of unwanted traffic on the
Router’s local network.
Security > Firewall
Firewall
Firewall Protection To use firewall protection, keep the
default selection, Enable. To turn off firewall protection,
select Disable.
Block WAN Requests
Block Anonymous Internet Requests This feature
makes it more difficult for outside users to work their
way into your network. This feature is selected by default.
Deselect the feature to allow anonymous Internet
requests
.
Filter Multicast Multicasting allows for multiple
transmissions to specific recipients at the same time. If
multicasting is permitted, then the Router will allow IP
multicast packets to be forwarded to the appropriate
computers. This feature is selected by default. Deselect
this feature to disable it.
Filter Internet NAT Redirection This feature uses
port forwarding to block access to local servers from
local networked computers. Select Filter Internet NAT
Redirection to filter Internet NAT redirection. This feature
is not selected by default.
Filter IDENT (Port 113) This feature keeps port 113 from
being scanned by devices outside of your local network.
This feature is selected by default. Deselect this feature to
disable it.
Click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes.
Security > VPN Passthrough
The Security > VPN Passthrough screen allows you to enable
VPN tunnels using IPSec, PPTP, or L2TP protocols to pass
through the Router’s firewall.
Security > VPN Passthrough
VPN Passthrough
IPSec Passthrough Internet Protocol Security (IPSec) is
a suite of protocols used to implement secure exchange
of packets at the IP layer. To allow IPSec tunnels to pass
through the Router, keep the default, Enable.
PPTP Passthrough Point-to-Point Tunneling Protocol
(PPTP) allows the Point-to-Point Protocol (PPP) to be
tunneled through an IP network. To allow PPTP tunnels to
pass through the Router, keep the default, Enable.
L2TP Passthrough Layer 2 Tunneling Protocol is the
method used to enable Point-to-Point sessions via the
Internet on the Layer 2 level. To allow L2TP tunnels to pass
through the Router, keep the default, Enable.
Click Save Settings to apply your changes, or click Cancel
Changes to cancel your changes.
Access Restrictions > Internet Access
The Access Restrictions > Internet Access screen allows you
to block or allow specific kinds of Internet usage and
traffic, such as Internet access, designated services, and
websites during specific days and times.
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Wireless-G Broadband Router
Access Restrictions > Internet Access
Internet Access
Internet Access Policy Access can be managed by a
policy. Use the settings on this screen to establish an
access policy (after Save Settings is clicked). Selecting a
policy from the drop-down menu will display that policy’s
settings. To delete a policy, select that policy’s number
and click Delete. To view all the policies, click Summary.
(Policies can be deleted from the Summary screen by
selecting the policy or policies and clicking Delete. To
return to the Internet Access tab, click Close.)
Internet Policy Summary
Status Policies are disabled by default. To enable a policy,
select the policy number from the drop-down menu, and
select Enable.
To create an Internet Access policy:
Select a number from the Internet Access Policy drop-
down menu.
To enable this policy, select Enable.
Enter a Policy Name in the field provided.
Click Edit List of PCs to select which PCs will be affected
by the policy. The List of PCs screen appears. You can
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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 Save Settings to apply your changes or Cancel
Changes to cancel your changes. Then click Close.
List of PCs
Select 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.
Decide which 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. Then
enter a range of hours and minutes during which the
policy will be in effect, or select 24 Hours.
Select any Blocked Services or Website Blocking you
wish to use.
Click Save Settings to save the policy’s settings, or
click Cancel Changes to cancel the policy’s settings.
Blocked Services
You can filter access to various services accessed over the
Internet, such as FTP or telnet, by selecting services from
the drop-down menus next to Blocked Services. (You can
block up to 20 services.) Then enter the range of ports you
want to filter.
If the service you want to block is not listed or you want to
edit a service’s settings, then click Add/Edit Service. Then
the Port Services screen will appear.
Port Services
To add a service, enter the service’s name in the Service
Name field. Select its protocol from the Protocol drop-
down menu, and enter its range in the Port Range fields.
Then click Add.
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