Huawei Technologies H3CSOHOXDR8X4G VoIP Wireless BroadbandRouter User Manual

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Users Manual Part II

Contents

1. Users Manual Part II
2. Users Manual Part I

Users Manual Part II

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 54 g can us achment Setting] page. You can bind the Ethernet port arameters for PVC. I. ports) d out by different access servers improve ecurity and stability of the system and ease the load of BASs remarkably. n also configure an Ethernet port as a management port to manage devices. You onfiguration management page of your VDR824/824g through a host that is connected to the management port. By default, the four LAN ports of the D5 Advanced Configuration After you complete the proceeding configuration correctly, the VDR824/824access all Internet services. This chapter introduces how to configure the advancedfunctions of the VDR824/824g to enhance the performances, thereby satisfying variodemands on network configuration. 5.1 Binding LAN Ports to PVCs Click [LAN/PVC] to enter the [Attto a PVC and set the corresponding QoS pPVC Binding Settings With the PVC binding function, you can bind any of the four Ethernet ports (LAN to any of the four upstream PVCs. Each PVC bridges data from the bound Ethernet port to the broadband access server (BAS) to accommodate different Internet services through different Ethernet ports. Services such as the Internet accessing, video-on-demand (VOD), and IPTV carriesYou cacan access the cV R824/824g are all the management ports.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 55 Figure 5-1 PVC Binding Settings As Figure 5-1 shows, there are five options for each Ethernet port (LAN1 to LAN4) in the drop-down list: Attached to PVC1/2/3/4 and Attached to Router (Default). Upon the configuration of these LAN ports, you need to click <Apply> to save your configuration and have it take effect. Then in the [PVC Setting] section set VPIs/VCIs for the corresponding PVCs. Values of VPI/VCI are provided by your ISP. Click <Apply> in this section to save your configuration. Caution: z You can manage your VDR824/824g only through the PC connected to management port or the USB port. z If all the four Ethernet ports are configured to be bound to PVCs, you can still acthe ort. Refer to section 8 “Appendix - USB Configuration” for more information about the USB port. Tscess the configuration management page through the USB pz he VPI/VCI values of different PVCs cannot be identical with each other or the ame as those on the other configuration pages. The umption: z Bind a LAN port to PVC 0/35 to access the IPTV Website that your ISP set up. The Website uses DHCP to assign IP addresses dynamically. following example illustrates the configuration upon the ass

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 56 rts ISP ct the fault as that ince for them. z Bind other two LAN ports to PVC 0/100, and the PCs connecting to these poaccess the Internet through PPPoE dial-up connections. z Route the last LAN port to access the Internet and apply NAT-enabled PPPoEservice on this port. Bind it to PVC 8/35. The user name and password yourassigns are username and myPassword respectively. Follow these steps to achieve the settings on your VDR824/824g. 1) On the [Ethernet Port Attachment Setting] page (see Figure 5-2), seleAttached to PVC1 option from the LAN1 drop-down list to bind LAN1 to PVC1and bind LAN2 and LAN3 to PVC2 in the same way. Leave the LAN4 desetting Attached to Router untouched. Click the <Apply> to save your configuration. 2) In the [PVC Setting] section, set 0/35 as the VPI/VCI value of PVC1, 0/100of PVC2.Click <Apply> in the [PVC Setting] section to save your settings. Syou do not use PVC3 and PVC4 here, there is no need to specify VPI/VCI values ment Setting page Figure 5-2 Actual configuration on the Attach3) Click <Quick Setup> in the navigation bar and select the PPPoE Login option on the [WAN Connections] page. Set the values of VPI and VCI to 8 and 35 respectively, type userName, myPassword, and myPassword in the PPPoE Username, PPPoE Password, and PPPoE Password (confirm) text boxes respectively and then click <Apply> to save your settings.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 57 re 5-4 depicts these Click <Status> in the -48. You can find d of the original one nnected to the LAN4 Figure 5-3 Set the PPPoE authentication information 4) It takes about two minutes for your settings to take effect. Figusettings. Actual configuration on the WAN connections page navigation bar to bring up the [Status] page as shown in Figure 4that the WAN IP Address item is a public IP address instea0.0.0.0. Then you can access the Internet through a PC coport. l settings on the Status page ding of the LAN ports to the PVCs. Connect a PC which is configuredIP address automatically to the LAN1 port. You can then access theFigure 5-4 Actua5 the bin to obtain an IPTV Website of your ISP. Similarly, connect PCs to the LAN2 and LAN3 ports and access the Internet by PPPoE connection. After you enter the user name and password, the PC can obtain an IP address quickly and set up a connection with the Website. ) Verify

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 58 II. QoS configuration For the upstream a ous tra A se ng tThis ensures high ance QoS. C S Settin [QoS Config] pag packets over an ADSL line, your VDR824/824g supports multiplensfer mode (ATM) services, such as CBR, VBR-rt, VBR, UBR, andvides different measures, caching space, scheduling priorities, ando allocate appropriate bandwidth to ATM services of different types. -performsynchronBR. DR814Q prorvice shapilick <Qo g…> in the [PVC Setting] section as shown in Figure 5-1 to enter thee of a corresponding PVC as below. Figure 5-5 QoS Config page You can set different ATM service types for specified PVCs from the ATM Traffic Class -down list and configure QoS parameters for the selected service type. For more mation, refer to Table 5-1. dropinforls Tab e 5-1 Description of commonly used ATM service typeService type Description UBR (unspecified bit rate) Suitable for services that are not real-time-critical and with large burst traffic. UBR demands best-effect services on the network side. When applying for services, you are not required to set QoS parameters except for PCR, which limits the upper rate. The network side does not guarantee Qowill be discarded first in a network coS for UBR services. UBR cells ngestion. Error correction is carried out by upper-layer protocols. Typical applications are FTP and E-mail.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 59 Service type Description CBR highest priority. This type of service caSu(constant bit rate) application. The source can transmit cells at a negotiated PCR or a rate lower than it. Titable for services that require static bandwidth and demand the n provide stable traffic with the minimum burst. Only PCR parameter is needed for CBR service ypical applications are circuit and emulated voice. VB(re ces allow limited n be different at arameters required for VBR-rt service application include PCR, SCR, and MBS or BT. Typical VBR-rt applications are voice and interactive video services and IPTV. R-rt al-time Sensitive to delay and jitter of data flow. Similar to CBR except that they are delay- and jitter-sensitive. VBR-rt serviburst. The transmission rate on source side cavariable bit different time. The prate) VBR (non-real-time variable bit rate) Suitable for bursting non-real-time services. Compared to VBR-rt, a distinct feature of VBR services is that demands of real-time are not so crucial, and the priority for service data processed on the network side is also lower than that of VBR-tithe parameters required by VBR services include PCR, SCR, and MBS (or BT), the same as that of VBR-rt. Keep 0 unchanged for those options unrelated to the configuration. As shown in Figure 5-5, if VBR-rt is selected from the ATM Traffic Class drop-down list, you need to set values for Peak Cell Rate, Max Burst Size, and Sustainable Cell Rate and leave 0 in the Burst Tolerance and Minimum Cell Rate text boxes. An example is taken to explain how to configure ATM QoS parameters. You must configure to meet the following requirements for the ATM QoS parameters of your VDR824/824g to take effect: z The digital subscriber line access multiplexer (DSLAM) has a relax control or even port and PVC upstream rates, entirely depending on the ADSL line. The actual upstream rate of ADSL can be 896 Kbps at most if DSLAM eam rate of each PVC is strictly specified by the central office (CO), whereas the upstream rates of the PVCs are all configured to 896 Kbps.PVC1 and e configured on each ADSL line, among which you use PVC1 to access the Internet and PVC2 to provide video chatting service. at the CO, audio and video services carried out over them may still be interfered. For example, an uploading service, which consumes a bandwidth lager than 500 Kbps, bursts on PVC1 when a video conference, which requires a minimum bandwidth of 384 Kbps for both upstream and downstream rates, is carried out over PVC2. This results in no control over the LANsupports ADSL only. z Multiple PVCs are configured on a single ADSL line. Suppose that: The downstrPVC2 arAnalysis: Although an upstream rate of 896 Kbps is configured to PVC1 and PVC2 respectively

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 60 ilable bandwidth for PVC2 less than 384 Kbps, thus causing the audio and video service interrupted. 1) Click <QoS Setting…> in the [PVC Setting] section as shown in Figure 5-1 to enter 6000, the avaTo avoid this, configure the QoS parameters as follows: the [QoS Config] page of PVC2. 2) Select the VBR-rt option from the ATM Traffic Class drop-down list. 3) Set Peak Cell Rate to 2000 (approximately 800 Kbps), Max Burst Size to and Sustainable Cell Rate to 1000 (approximately 400 Kbps). 4) Click <Apply> to save your settings. Figure 5-6 QoS configuration For PVC1, keep the default UBR settings unchanged. Thus, PVC1 can occupy all the pstream bandwidth when there is no traffic on PVC2, and PVC2 can always be guaranteed with an average bandwidth of 400 Kbps for audio and video services over it. ensures normal upload over PVC1 and non-interrupted real-time communication over5.2 Securliare olicy, Trigger and IDS. Click any tab to enter your desired uration page. uThis PVC2. ity C ck [Security] in the navigation bar to enter the corresponding page where four tabs available: Interface, Pconfig

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 61 5.2.1 Intsecurity function and configure security interfaces. erface Every firewall policy is intended for access between security interfaces. This page allows you to enable the I. c enable/di Like ch operation can also be used to enable/disable the firewall and intrusion Figure 5-7 Add a security interface Se urity state To sable the security function, select the corresponding Enabled/Disabledoption, and then click <Change State>. wise, sudetection. Caution: z You can enable the firewall, intrusion detection and NAT only when the security function is enabled. z If the security function is disabled, the firewall, intrusion detection and NAT are also necessarily disabled.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 62 y level After the firewall is enabled, the [Security Level] drop-down list appears in the [Security II. SecuritLevel] section as below. Figure 5-8 Security Level drop-down list This drop-down list includes the following options: z none: (default setting) Indicates that the external and internal users have naccess right. z high: Indicates that the internal users have some access rights and the externusers have no access right. z medium: Indicates that the external and internal users have more access rightz low: Indicates that the external and internal users have the maximum access rights. z default: Indicates that the internal users can access all the Internet serviceso al s. external users are prevented to access the internal network curity level, select an option from the drop-down list, and then click <Change Level>. , the To set the corresponding se

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 63 Caution: z By default, the none security level is not configured with port filtering policies. In thcase, internal users cannot access all the Internet services, and the internal netwocannot be accessed from the outside, either. To enable the access right to a serviceyou need to configure the corresponding port policy. For details, refer to se5.2.2 “Policy”. z The default port filtering policies are configured to the security levels except After a security level is set, the corresponding policy appears on the port filteriis rk , ction none. ng u can also configure a policy manually as needed. For details, refer to page. Yosection 5.2.2 “Policy”. I. Security interface IIrity rity d you You can establish the corresponding firewall policy between a group of secuinterfaces. The security interface table lists the information about existing secuinterfaces. By default, the VDR824/824g defines all interfaces as security ones ancannot create a new security interface any more. If you have created a virtual interface(refer to section 4.3.1 “LAN”), <Add Interface…> appear on the page as below. Figure 5-9 Security interface In this case, you can add a security interface by clicking <Add Interface…> to enter the page as below.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 64 Figure 5-10 Security – add an interface Select an interface type, external, internal or DMZ from the [Interface Type] drop-down list, and then click <Apply>.The configured interface has been added to the n the [Security Interfaces] section as below. security interface table o Figure 5-11 Security interface table To delete a security interface, click the corresponding <Delete Interface…> button,then click <Delete> on the [Delete Interface] page. and

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 65 Figure 5-12 Delete a security interface IVThe N chnology can translate an intern ress into a valid public IP address, and thusY t page as shown in Figure 5-11 to enable/disable NAT between the ac ge. NAT configuration AT te al private add PCs in the LAN can share a public IP address for network access. hree buttons on theou can click thethree types of interfaces. After the NAT is enabled, you can performnfiguration. Click <Advanced NAT Configuration…> to enter the as below. dvanced NAT coonfiguration pa Figure 5-13 Advanced NAT configuration 1) Global address pool This page allows you to add a public IP address obtained from your ISP to the global address pool. After NAT is enabled, internal addresses are randomly translated to an unused address in this pool.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 66 To add a public IP address or an address pool, click <Add Global Address Pool…> toenter the configuration page as below. Table 5-2 Description onFigure 5-14 Add a global IP address pool the items of the global IP address pool Item Description Interface Type Select the intrerface type corresponding to a public IP address from op-down list. the dUse SubneConfiguration Select the me Usegme ess Range option indicates to specify a ranget Th ethod to specify the address from the drop-down list. se Subnet Mask option indicates to specify a network nt. The Use IP Addr of the IP address. IP Address optioType nAddrein the IP address of a segment if the Use Subnet Mask is selected. Type in the start IP address if the Use IP ss Range option is selected. Subnet Mask/IP Address2 Type i t Mask option iAddren the subnet mask of the segment if the Use Subnes selected. Type in the end IP address if the Use IP ss Range option is selected. Click <Add Global Addre will be added to the addr) Virtual server cessed from the rvice requests through port number and forward them to the virtual server. To configure a virtual server, click <Add Reserved Mapping…> in the [Reserved Mappings] section (see Figure 5-13) to enter the page as below. ss Pool> after the configuration is complete. This IP addressess pool. 2After NAT is enabled, the internal network devices cannot be acInternet. To provide public services such as Web server, Email and FTP for the outside, a virtual server needs to be configured to make the network computer with private static IP address provide these services. Although the internal service address cannot be accessed by external users directly, the VDR824/824g can identify se

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 67 igure 5-15 Virtual server configuration page scription on the items of the virtual server FTable 5-3 DeItem Description Global that thecan typThe default address, 0.0.0.0, can be reserved which means address obtained from the WAN port is used. Or you e in the address from the global address pool. IP Address Internal Type in the IP address of internal PC providing application services. Transport Type Select the protocol type for the application service from the drop-down list. External Port Range Most application services forward inbound and outbound packets through the same port. In this case, you can just configure Start and End as this port number. But some application services forward inbound and outbound packets respectively through different ports. In this case, you need to type in the port range used by the inbound packets. Internal Port Range packets through the same port. In this case, you can justconfigure Start and End as this port number. But somapplication services forward inbound and outbound packetrespectively through different ports. In this case, you need totype in the port range used by the outbound packets. Most application services forward inbound and outbound e s Click <Add Reserved Mapping> after the configuration is complete. Example: To configure the PC with the address 192.168.1.100 as a virtual seprovide an FTP service for the outside (with the port number 21), refer to theconfiguration in Figure 5-16. Thus, all FTP requests from the Internet users will beforwarded to the PC (server) with the fixed IP address 192.168.1.100. rver to

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 68 Figure 5-16 Example of the virtual server configuration  Note: NAT can work between: z External interface and internal interface z External interface and DMZ z DMZ and internal interface. Security policy is a rule set to limit inbound and outbound data between differen5.2.2 Policyt types s. The VDR824/824g provides a powerful security module to support the etween external and internal interfaces, between external interface and DMZ, and between DMZ and internal interface respectively, thereby of interfacefirewall policies configured bsatisfying various demands on network security. The firewall must be enabled before the creation of a policy. Figure 5-17 Security policy configuration

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 69 ) the I. Port filter You can configure the port filtering policy to limit the data transmission of a protocoltype. To configure a group of interfaces (suppose external interface and internal interfacewith the port filtering policy, click the corresponding <Port Filters…> button to enterpage as below. er Figure 5-18 Firewall port filtT ists the currently display the corresponding port filtering policies. Other types of packet requests not configured with cies T te a pol c confirm on the popup page. T y for the port enter the pagehis page l configured policies. Select different firewall security level to the poliicy, click thewill be blocked by the firewall. orresponding <Delete> button, and then click <Delete> too deleo add a polic number of the protocol, click <Add TCP or UDP Filter> to as below.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 70 Figure 5-19 TCP/UDP port filtering policy Table 5-4 Description on the items of TCP/UDP port filter Item Description IP Type in the source IP address. The default address Address 0.0.0.0 indicates any node on the network. Source address Mask Type in the subnet mask of the source. The default mask 0.0.0.0 indicates any node on the network. IP Address Type in the destination IP address. The default a0.0.0.0 indicates any node on the network and is usualreserved. ddress ly Destination address Mask Type in the subnet mask of the destination. The defamask 0.0.0.0 indicates any node on the network anusually reserved. ult d is Protocol Select a protocol type (TCP or UDP) from the drop-dlist and apply the filtering policy to the packettype. own s of this Source port Range Start-End Type in the port range of the source. The default rafrom 0 to 65535 indicates any node and is us nge ally ureserved. Destination port Range Start-End parameter needs to be set. For examservices, type in the correspoType in the port range of the destination. Generally, this ple, to control Web nding port number 80. To control FTP services, type in the port number 21. Inbound The direction of inbound data. Select Allow to permit external hosts to access internal hosts. Select Block to forbid external hosts to access internal hosts. Direction Outbound Block to forbid internal hosts to access external hosts. The direction of outbound data. Select Allow to permit internal hosts to access external hosts. Select

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 71 Click <Apply> after the configuration is complete. This policy will be added to the list of port filtering policies. Example: If yo in p 0), but do not want the external users to access the internal HTTP server, y rform the configuu want the ternal users to access the external HTTP server (with theort number 8ou can pe ration as below. Figure 5-20 Example of theTo add a policy for a protoco er the page s below. port filtering configuration l, click <Add Raw IP Filter> in Figure 5-18 to enta Figure 5-21 Filtering policy based on the protocol type Table 5-5 Description on the items of the filtering policy Item Description IP Type in the source IP address. The default addre the network. ssAddress 0.0.0.0 indicates any node onSource address k Type in the subnet mask of the source. The default mask 0.0.0.0 indicates any node on the network. Mas

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 72 Item Description IP AddreType in the destination IP address. The default address ss 0.0.0.0 indicates any node on the network and is usually reserved. Destination address Mask Type in the subnet mask of the destination. The defamask 0.0.0.0 indicates any node on the network anusually reserved. ult d is IP Protocol Number or name Type in a protocol name or number and apply thisfiltering policy to the packets of this type. The protname can be TCP, UDP or ICMP. For other protocyou need to type in their protocol numbers. For examptype in 2 for IGMP, and 46 for RSVP. ocol ols, le, Inbound The direction of inbound data. Select Allow to permit external hosts to access internal hosts. Select Blockforbid external hosts to access internal hosts. to Direction Outbound The directiointe n of outbound data. Select Allow to permit rnal hosts to access external hosts. Select Block to forbid internal hosts to access external hosts. Click <Apply> after the configuration is complete. This policy will be added to the list of port filtering policies. Example: By default, the external hosts are not allowed to ping the WAN port even if thesecurity level is set to low. To allow the internal hosts and external hosts to ping each other, you can perform the configuration as below. Figure 5-22 Example of the filtering policy for a protocol (2) II. ators By specifying the IP figuring the corresponding policy, you can restrict e access right of a host or hosts on a network segment. Host validaddress and conth

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 73 To configure host validators to a group of interfaces, click the corresponding <Host Validators…> button in the [Current Security Policies] section (see Figure 5-17) to enter the page as below. Figure 5-23 Host validators page To add a host validator policy, click <Add Host Validator…> to enter the page as below. Figure 5-24 Configure a host validator Table 5-6 Description on the items of the host validator Item Description Host IP Address Type in the IP address of the host or network segment to be restricted.Host Subnet Mask Type in the subnet mask of the host or network segment to be restricted. Direction Select the direction of data transmission. Select inbound to block the inbound data only. Select outbound to block the outbound data only. Select both to block both inbound data and outbound data.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 74 Example: To block a host with the IP address 192.168.1.10 in the LAN to access an , and permit the external users to access this host, you can perform the configuration as below, and then click <Apply>. external network Figure 5-25 Example of the host validator configuration (1) Example: If you find a suspicious host (with the IP address 10.1.1.2) in an external al network, you can set the host validator policy as below to block its attack on the internhost. he host validator configuration (2) st, and the address 10.1.1.2 to the internal host while Figure 5-26 Example of tAs shown in Figure 5-26, inbound is selected from the [Direction] drop-down lithus the device only block the data from the internal host can still send data to the address 10.1.1.2.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 75 Caution: z The host validator can be used to limit the data stream between the WAN and LAports. z The security policy takes effect only when the firewall is enabled. N 5.2.3 Trigger al with application protocols that set up separate sessions. Some application protocols, such as NetMeeting, open the primary sessions rmal operations. The trigger tells the security mechanism to handle these se ns and instruct it how to handle ger handles the situatio , allowing the secondary s n a the firewall. A security trigger is used to deand secondary connections at the same time during the nocondary session dynamicallythem. The trigessions only whe ppropriate. These newly triggered sessions are not restricted by trigger Figure 5-27 Security T llows youzzz Delete an existing security trigger. T secu below. his page a to: View the informa Create a new setion in the current security trigger list. curity trigger and add it to the current security trigger list. o create a new rity trigger, click <New Trigger> to enter the page as

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 76 of the security trigger Figure 5-28 Add a security trigger Table 5-7 Description on the items Item Description Transport Type From the drop-down list, select a transport type (TCP or UDP) to which the newly added trigger is specified. Port Number Start Type in the start of the trigger port range that the primary session uses. Port Number End Type in the end of the trigger port range that the primary session uses. Secondary Port Type in the Number Start start of the trigger port range that the secondary session uses. Secondary Port Number End Type in the end of the trigger port range that the secondary session uses. Allow Multiple Hosts Select Allow if you want a secondary session to be initiated by different remote hosts. Select Block if you want a secondary session to be initiated only by one remote host. Max Activity Interval Type in the maximum activity interval (in milliseconds) for secondary port sessions after the primary session starts. Enable Session Chaining Select Allow or Block to determine whether the multi-level TCP session chaining is accepted or not. Enable UDP Select Allow or Block to determine whether the multi-level UDP session chaining is accepted or not. Session Chaining enable the session chaining. Before this, you must Binary Address Select Allow or Block to determine whether Replacement to use the binary address replacement on the current trigger or not. Address Translation Type Specify the address replacement type on a trigger. Before this, you must set the binary address replacement to Allow. Click <Apply> after the configuration is complete. The [Security Trigger Configuration] page is displayed, containing details of the trigger that you have just configured.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 77 To delete an existing security trigger, click the corresponding <Delete> button in Figure5-27 and then click <Delete>. Figure 5-29 Delete a security trigger In fact, the VDR824/824g has provided an Application Level Gateway (ALG) for eting. NetMeeting applications can be also normal even if the port trigger is not ured. The following example is taken to show how to configure a port trigger if the to the LAN interface of the VDR824/824g, and you want have an audio/video chat with Internet users, and to apply m sharing. connection is established, NetMeeting needs to re-enable the TCP 1503 port to use whiteboard and program sharing. NetMeeting also needs to enable any port of TCP and UDP protocols within the range of 1024 to 65535 to transmit audio and video signals. After the firewall is enabled, you can configure the port filtering policies and virtual servers of TCP and UDP protocols to all ports within the range. In this way, Internet users can actively call a LAN user during the use of NetMeeting. However, possible omission in configuring the filtering policy and virtual server may cause the failure of the audio/video chat establishment. Moreover, the virtual server configuration exposes almost all the LAN host ports to the Internet, resulting in the insecurity of the host. To solve these problems, you can perform the configuration as below to make the TCP 1720 port trigger TCP/UDP port within the range of 1024 to 65535. NetMeconfigVDR824/824g does not provide the ALG for NetMeeting. Suppose your PC is connectedto use NetMeeting to whiteboard and prograAnalysis: A NetMeeting call is established on the TCP 1720 port. After the

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 78 a LAN ackets ke the re the 5) and 5.2.4 IDS e the Figure 5-30 Example of the trigger configuration In this way, all applications provided by NetMeeting can be used normally after user calls the Internet user and you can just add the access policy suitable for pon the TCP 1720 port on the corresponding page (see Figure 5-19).To maInternet users call LAN users and use NetMeeting normally, you can just configuvirtual server on the TCP 1720 port on the corresponding page (see Figure 5-1combine it with the port trigger mentioned previously. IDS protects the current network from the following attacks: z Denial of Service (DoS). z Port scanning. z Web spoofing. IDS also implements the blacklist function. It stops external hosts that try to invadnetwork from accessing the VDR824/824g within a specific time limit.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 79 iguration of the IDS confiFigure 5-31 IDS confTable 5-8 Description guration items Item Description Use Blacklist Select true or false to enable or disable the blacklist function. When the external host attacks (Ascend Kill, Echo Scan, WinNuke, Xmas Tree Scan, IMAP SYN/FIN Scan, SMURF, TCP SYN Flood, Net Bus Scan and Back Orifice Scan) are found, these hosts are put into the blacklist and their packets are filtered out within the set time limit. Use Victim Protection Select true or false to enable or disable the Smurf protection which protects the VDR824/824g against attacks caused by pings with a broadcast address. The attacker may broadcast pings with the victim’s MAC address as the source MAC address. Without this protection, hosts in LAN will send response packets to the victim when receiving these packets, and even cause the collapse of the victim. With this protection, etect and drop ICMP packets sent by the attacker and continue to do so within a specific time limit. the VDR824/824g will d

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 80 Item Description Victim Protection Block Duration o do so within a e is 10 minutes. Block duration of Web Spoofing (Smurf) attacks on the host. If the device detects these attacks, it will filter all the ICMP packets that attack the host and continue tspecific time limit. The default valuDOS Attack Block Duration t legitimate users from accessing Block duration of DoS attacks on the host. If the VDR824/824g detects these attacks, it will filter all the packets that attack the host and continue to do so within a specific time limit. The default value is 30 minutes. DoS attacks will prevennormal Internet services. The DoS attacks that the device can detect include Smurf Attack, SYN/FIN/RST Flood, ICMP Flood, Ping Flood, Ascend Kill, WinNuke Attack and Echo Chargen. Scan Attack Block Duration ntinue to do so within a specific time 24 hours. Block duration of port scanning attacks on the host. If the VDR824/824g detects these attacks, it will filter all the packets that attack the host and colimit. The default value isScan Detection Threshold tect include an, IMAP scan, TCP SYN ACK scan, TCP FIN RST scan, NetBus scan, Back Orifice scan and SubSeven.Most of port scanning attacks are the Trojan Horse Threshold of port scanning packets. When the VDR824/824g detects port scanning packets (such as SYN/ACK, FIN or RST) sent by a host per second and the number of packets reaches the threshold, the device regards them as port scanning attacks. eThe port scanning attacks that the device can dEcho scan, Xmas Tree scattack. Scan Detection that port scanning continwill block all the packets thPeriod Statistics duration of port scanning. When the device detects ues to reach the set time, the device at attack the host and continue to do so within the time limit set in the [Scan Attack Block Duration] text box. The default value is 60 seconds. Port Flood host per second to awill time the Flood aDetection Threshold When the device detects that TCP SYNC packets sent by a fixed port exceed this threshold, the device ttack. If the timing reaches the limit set in the [Flood Detection Period] text box, the VDR824/824g concludes that the host is making a port flood attack, and starts blocking the packets sent by the host. default value is 10. TheHost Flood Detection Threshold host per second exceed this threshold, the device will time the Flood attack. If the timing reaches the limit set in the [Flood Detection Period] text box, the VDR824/824g concludes that the host is making a port flood attack, and starts blocking the packets sent by the host. The default value is 20. When the device detects that TCP SYNC packets sent by a

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 81 Item Description Flood Detection attack by a host reaches the set dPeriod When the VDR824/824g detects that the duration of Flood etection period, the device starts blocking the packets sent by the host. The default value is 10 seconds. Maximum TCP Open Handshaking Count When the open handshaking count that the VDR824/824g receives per second from a host exceeds the set value, the device concludes that the SYN/ACK attack is detected. The default value is 100. Maximum Ping Count The attacker may send a number of ping packets to a network. These packets consume too much bandwidth and make normal network services unavailable. When the device detects that the count of ping packets sent by a host per second exceeds the set value, the device concludes that the ping flood attack is detected. The default value is 15. Maximum ICMP Count The attacker may send a number of ICMP (non-Echo Request) packets to a network. These packets consume too much bandwidth and make normal network services unavailable. When the device detects that the count of ICMP packets sent by a host per second exceeds the set value, the device concludes that the ICMP Flood attack is detected. ult value is 100. The defa figuration, type in the relevant values of IDS options, and To modify the current IDS conthen click <Apply>. To clear the blacklist, click <Clear Blacklist>. Caution: By default, the security mode is enabled. 5.3 DMZ Configuration The Demilitarized Zones (DMZ) feature of VDR824/824g allows you to configure a nfigured on the same segment with this DMZ can perform bi-directional communication with other Internet users or servers. At the same al interface. This not only provides a security shelter for the hosts in the DMZ, but also satisfies the needs of DMZ in a LAN. The hosts that are cotime, you can enable NAT and configure a firewall policy between DMZ interface and internal interface, and between DMZ interface and extern

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 82 mall and medium-sized enterprises to provide services server installation in LANs by ssuch as FTP and Web for bi-directional communication with users. The following figure depicts the steps to configure DMZ: WDR854gVDR824/824gWDR854gVDR824/824g Figure 5-32 DMZ configuration I. Create a virtual interface To create a virtual interface, refer to section 4.3.1 “LAN”. Type in the following parameters on the [Create virtual interface] page as below, and then click <Apply>. pears on the [LAN connections] page (see Figure 4-16), showing that a Figure 5-33 Create a virtual interface The result apvirtual interface named item0 has been added into the list.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 83 II. Add an security interfaceRefer to section 5.2.1 III. “Security interface” to add a security interface. Perform the configuration on the [Add Interface] page as below, and then click <Apply>. Figure 5-34 Add a security interface Here, item0 is the virtual interface added previously. III. Configure the port filtering policy for external-dmz and external-internal interfaces respectively To configrespectively, refer to section I. “ure port filtering policy for external-dmz and external-internal interf es Port filter". ilters: external-dmz] page to configure a policy, ensuring that users can access the Internet services (such as HTTP, FTP, and Telnet) specified by D nwhile, enter the [Firewall Port Filters: eing policy, ensuring to disable users st services under the internal interface. IVthe same segment as that of the example, configure the IP address to .0.0, and enable the corresponding Internet service, t to the LAN port of the VDR824/824g. V. Virtual , ftp and telnet. Thus, the entire DMZ is configured completely and securely. acEnter the [Firewall Port Fthe MZ zone through the external interface. Meaext rnal-internal] page to configure the port filterunder the external interface to access the ho. Configure a DMZ host in the same segment with a DMZ zone Make sure that the IP address of the DMZ host is in above configured virtual interface. For172.16.1.100, the mask to 255.255and then connect this DMZ hosConfigure the corresponding virtual server To configure the corresponding virtual server, refer to section 5.2.1 IV. 2) ”server”. Configure the DMZ host as a virtual server to provide the Internet services, such as http

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 84 Cs on routes to ge, and age, and n click 5.4 Route Configuration The static route configuration makes the VDR824/824g to communicate with Pdifferent network segments. This option allows you to create static IPdestination addresses by an IP interface name or a gateway address. To access the VDR824/824g configuration page, follow either of these steps: z Click [WAN Setup] in the navigation bar to enter the [WAN Connections] pathen click <Route setup…>. z Click [LAN Setup] in the navigation bar to enter the [LAN Connections] pthen click <Route setup…>. z Click [Status] in the navigation bar to enter the [Status] page, and the<Route setup…>. utes: Figure 5-35 Route configuration This page allows you to: z View the information about existing routes z Modify the route information in the route list z Add a new route z Delete an existing route This page also allows you to view the following information about existing roz Whether the route is valid or invalid z Destination IP address (Destination) z Gateway address (Gateway) z Network mask (Netmask) z Whether the route is advertised via RIP (true or false) To change the destination address, gateway address, netmask and advertise status of route, change the settings in the relevant text boxes, and then click <Apply>. To modify the cost or interface settings for the route, click <Advanced Options…> to enter the [Advanced Settings] page. Change the related value, and then click <OK>. a

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 85 Figure 5-36 Advanced Settings page To delete an existing route, select the corresponding [Delete?] check box in Figure 5-35 and click <Apply>. To add a new route, click <Create new Ip V4Route…> in Figure 5-35 to enter the [IPV4Route] page. Type in the related values of route options, and then click <OK>. Click <Cancel> to cancel the settings and return to the route configuration page. Figure 5-37 Create a route

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 86 Caution: For DHCP or Static IP services, you must type in the next hop addrefiled (you cannot leave it blank), while you can set the [Interface] dropdefault (None) or other value. For other services (IPoA, PPPoA, and PPPoE), you can interface or the gateway. If both of them are specified, only the interfaeffect. ss in the [Gateway] -down list to the specify a value of either the ce value takes Example: Figure 5-38 illustrates a physical connection that requires static routes. WAN:192.200.200.81/24VDR824BASDSLAMSwitchWAN:192.200.200.10/24192.200.200. 1/24RouterLAN2:16.0.0.0/4LAN1:192.168.1.0/24WAN:192.200.200.81/24VDR824BASDSLAMSwitchWAN:192.200.200.10/24192.200.200. 1/24RouterLAN2:16.0.0.0/4LAN1:192.168.1.0/24 Figure 5-38 Network diagram for the static route configuration In Figure 5-38, suppose that a DHCP service is configured for the VDR824/824g, the gateway address is 192.200.200.1, and there is a default route to broadband access server (BAS).A router is connected to another network segment, LAN2 (16.0.0.0/4), on the WAN side, and the IP address of the WAN port is 192.200.200.81.To make hosts in LAN1 access hosts in LAN2 normally, you need to create a route as below so that the VDR824/824g can choose routes for packets correctly.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 87 Figure 5-39 Example of the static route configuration Two tabs, SNTP and ZIPB, are available on the [Service] page. Click any tthe corresponding configuration page. Configure the VDR824/824g as an SNTP client and thus you can obtain atime/date information from the corresponding SNTP server. If your router is not 5.5 Service ab to enter 5.5.1 SNTP ccurate set the time/date on the VDR824/824g instead. connected to the SNTP server, you can

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 88 you to: ck of the VDR824/824g To s cal time of the router with the SNTP server, click <Synchronize>. then cli >. main name of the SNTP server in e [NTP servers:] field, and then click <Add>. To delete an existing NTP server, click the corresponding <Delete> button. 5.5.2 ZIPB ZZIPB (zero installation PPP bridge) can ensure that a SOHO user can obtain a public IP address through the router, and to resolve the problem that all SOHO routers with NAT enabled cause part of the application unable to function normally. Figure 5-40 SNTP configuration This page allowsz View the current system time configuration z Set the time zone z Configure the NTP server on the Internet to make the closynchronize its internal clock. ynchronize the loTo set the time zone, select a desired option from the corresponding drop-down list and ck <Set TimezoneTo add an NTP server, type in the IP Address or the doth

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 89 e allows you to: it. If enabled, click <Disable> om the drop-down AN interface] Figure 5-41 ZIPB configuration This pagz Enable/disable the ZIPB mode z Specify the ZIPB host z Perform advanced ZIPB configuration. If the ZIPB is currently disabled, click <Enable> to enable to disable it. Select the PC that will use the public IP address in the current LAN frlist, and then click <Apply>. To perform advanced ZIPB configuration, follow these steps: z Select the LAN interface on which ZIPB will run from the [LAN interface] drop-down list. z Select the WAN interface on which ZIPB will run from the [Wdrop-down list. Click <OK> after the ZIPB configuration is complete.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 90 Caution: z Change the configuration, and then click <OK>. The new configuration will take effect afterMake ensure that ZIPB is disabled before you change the ZIPB configuration. you enable ZIPB. Any change on the configuration takes no effect when hz Cure it wadYt e ZIPB is enabled. onfiguration changes on ZIPB will not be saved, and so you need to reconfighenever the router restarts. That is, make the previous ZIPB host obtain the IP ddress again through DHCP, and then specify a new ZIPB host from the rop-down list z ou can enable ZIPB only for two WAN services: PPPoE and PPPoA. 5.5.3 SNMP The VDR824/824g supports simple network management protocol (SNMP) proxy function, exchanging SNMP information with the network management sites through SNMP. Figure 5-42 SNMP Client Setting page

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 5 Advanced Configuration 91 You can create an SNMP community in Figure 5-42 and this community will be displayed in the community list. The VDR824/824g authenticates the SNMP packets according to the defined information in the list. To add a community, refer to the folloclick <Add>. z community: Type in the community name, uniquely identifying an SNMP community. The packets mismatching the community name are discarded. WriteEnable: Specify the access right for the community. If Read-Only is selected, fault setting 0.0.0.0, which indicates the ackets is not restricted. ng <Delete>. wing information to perform the settings, and then z this community can only view the VDR824/824g information; if Read-Write is selected, this community can view or modify the VDR824/824g information. z ServIP: Specify the IP address of the management site sending SNMP packets. It is recommended that you keep the desource IP address sending the SNMP pTo delete the current community, click the correspondi

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 6 Troubleshooting 92 6 Troubleshooting This chapter gives solutions to problems you may encounter when installing or using e VDR824/824g, and provides instructions for using several IP utilities to diagnose do not resolve the problems. 6.1 VDRSym power LED does not illuminate. z Symconnnected to the ADSL port and the telephone port. mptSolu hether: z z steps described in section 2.3 “Device z Symthproblems. Contact Customer Support if these suggestions824/824g Troubleshooting ptom 1: TheSolution: Check whether: z The power switch is turned on. z used. The power adapter is securely connected to the VDR824/824g and the power socket. The power adapter that comes with the VDR824/824g is ptom 2: The ADSL2+ Link LED does not illuminate after the telephone cable is ected. Solution: Check whether the telephone cable is securely conSy om 3: The LAN LED does not illuminate after the Ethernet cable is connected. tion: Check wz The power connection is good. The Ethernet cable is securely connected to the port. The correct cable is used. To check this, connect two ends of the cable to the LAN ports of the VDR824/824g, observe whether the corresponding LED illuminates. If not, change the cable and follow theConnection” to set up the connection. The PC has an Ethernet NIC installed correctly. ptom 4: You forget your password.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 6 Troubleshooting 93 and defapassSolution: If you have not changed the password, use the default user name (admin) password (admin).Press the Reset button for at least five seconds to restore the ult settings on the VDR824/824g.Then you can use the default user name and word. Caution: Resedefatting the VDR824/824g removes all the customized settings and restores the ult ones. ptom 5: Fail to access the Web configuration page. tion: Follow the procedures to check whether: The version of the Internet Explorer is Microsoft Internet Explorer 5.5 or Netscape 6.0 or later. PC and the VDR824/824g are in the same network seSymSolu1) 2) gment. ectivity: 4) If the physical connections are normal, but you still cannot access the Web the Internet with your PC. d you can ping the IP address of the IP address of the DNS is specified as that of the VDR824/824g’s LAN port or the ess of the 3) Use the ping command in an MS-DOS window to check the network connz Ping 127.0.0.1 to see if the TCP/IP protocol is installed. z Ping 192.168.1.1 (the default IP address of the gateway) to check for the connection between the PC and VDR824/824g in the LAN. configuration pages of the VDR824/824g, make sure the proxy server and the dialup connection are disabled. Symptom 6: Fail to accessSolution: Follow the procedure: 5) Check whether the ADSL2+ Link LED is solid ON. If not, check the ADSL line connection. 6) Check whether the IP address is obtained anVDR824/824g’s LAN port if you configure the PC to obtain the IP addresses of the host and the DNS server automatically (recommended). Refer to section 6.2.1 “Ping” for instructions on how to use the ping utility. If you cannot ping the port, check if the Ethernet cable is correct. 7) When the current PC is specified with a private IP address, make sure that: The PC resides in the same segment as that of the VDR824/824g’s LAN port. The IP address of the gateway is specified as that of the DVDR824/824g’s LAN port. The DNS Server the ISP allocates. The host is able to ping the IP addrVDR824/824g’s LAN port.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 6 Troubleshooting 94 section 4.7 “Status”) first, and check to see if the WAN port of the VDR824/824g Internet IP address and if the default route exists. mptom 7: You cannot access the Web pages through the PC in the LAN. Solution: Follow the procedure to check: n ping the Internet IP address, but cannot open the Web rarily. In this case, se either of the following to solve the problem: Manually change your 824/824g and manually modify the configuration for DNS Relay (refer to section 4.2.2 “DNS Relay"), and then check by the nslookup Solution: This problem is due to the MTU value from the client to the VDR824/824g. It AN”) to change the MTU value to a smaller one, such as 1440, and then select g are very strict, it is recommended someone familiar with the WAN services and router configuration enable the firewall 8) When the host can communicate with the VDR824/824g normally, but cannot connect to the Internet, log into the [Status] page of the VDR824/824g (refer to has obtained theSy9) The DNS server IP address specified on the PC is correct. If you specify the PC to obtain the DNS server address dynamically, verify with your ISP that the address configured on the VDR824/824g is correct, and then you can use the ping utility to test the connectivity with your ISP’s DNS server. 10) Generally, if a host capages, the DNS server of the ISP is experiencing a failure tempoyou can chooPC’s DNS IP address to the address of a normally functioning DNS server. Log into the Web page of the VDRcommand as instructed in section 6.2.2 “Nslookup”. Symptom 8: Fail to save the changes made on the Web configuration pages. Solution: Make sure that you click <Apply> to confirm every change you have made. After completing all the settings, enter the [Save Configuration] page to save them, thus making them take effect when the VDR824/824g is powered on next time. Symptom 9: You can access most of the websites, but sometimes connection to some websites times out. When you set the VDR824/824g to operate in the bridge mode and your PC to establish a dialup connection, you can access the websites normally. How does this problem come? is set too large. To solve the problem, enter the specific editing page (refer to section 4.2.1 “Wtrue from the [TCP MSS Clamp] drop-down list. In addition, if you fail to send an E-mail in the LAN, but succeed when you change anSMTP server, or you fail to transfer files by the point-to-point communication software, but succeed in transferring photos with other friends, this may be caused by thesettings of the MTU for the LAN interface if you are sure the server functions well. Enter the [LAN Connections] tab page (refer to section 4.3.1 “LAN”) to change the MTU value to a smaller one, such as 1440, and then select true from the [TCP MSS Clamp] drop-down list. Symptom 10: Some services are unavailable once the firewall is enabled. Solution: As the firewall rules of the VDR824/824

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 6 Troubleshooting 95 e firewall. 6.2 Diag6.2.1 Pingputers on the network. A ping command sends messages to the specified computer. If the r receives the messages, it replies with the response message. Before using the command, you must know the IP address of the destination host with which your PC and prompt window displays the and configure the firewall rules. Before the creation of firewall rules, you must be clear about the Internet service deployment. It is recommended that you disable thnosis Tools Use the Ping command to check whether your PC can recognize other comcomputeis trying to communicate. At the DOS prompt, enter the following command: ping 192.168.1.1 If the destination host receives the packet, the commcontents as shown in Figure 6-1. Figure 6-1 Use the ping command – the ping succeeds If the destination PC is not reachable, the Request timed out message is displayed as follows: igure 6-2 Use the ping command – the ping fails F

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 6 Troubleshooting 96 To check the connectivity with the VDR824/824g, use the Ping command with the default IP address of the LAN port (192.168.1.1) or the address you assign. To check the connectivity with the Internet, enter an Internet domain name, such as www.yahuse the nFor other operating systems running the IP protocol, you can enter the same ping command at a command prompt or through a system administration utility. mand to ok up in the DNS server (usually located though your ISP).If that name is not in your s DNS table, the request is then sent to a higher-level server until the name is found. r then returns the associated IP address. On Win ter, you can execute the nslookup command from the [Start] lick <OK> and a command prompt window appears. The [Command Prompt – okup] wi t prompt (>).At the prompt, type the domain . The hown below. oo.com (216.115.108.243).If you want to look up the IP address of a website, slookup command as instructed in section 6.2.2 “Nslookup” for details. 6.2.2 Nslookup The nslookup command is used to query the IP address associated with a domain name. You can specify the common domain name and use the nslookup comloISP’The servedows-based compumenu. Choose [Start/Run] and in the open text box type the following: nslookup Cnslo ndow is displayed with a brackename of the desired Website, for example www.microsoft.comwindow displays the associated IP address as s Figure 6-3 Use the nslookup command Some websites with heavy traffic use multiple servers to carry the same information. So it is common to have several IP addresses associated with one Internet domain name. To exit from the nslookup utility, enter exit.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 7 Appendix - TCP/IP Protocol 97 Protocol 7.1 Instg must have the TCP/IP alled, follow these steps. 7 Appendix - TCP/IPalling TCP/IP The PC through which you configure your VDR824/824installed. If you are not sure whether TCP/IP is inst Caution: By default, TCP/IP is installed on Windows 2000/XP. The following steps are described for the Windows 98/ME/NT. n the [Network] dialog box and the item that contains both using exists. If not, click dialog box (see Figure 7-1). 1) Choose [Start/Settings/Control Panel]. 2) Double-click the Network Connection icon to opeselect the [Configuration] tab (see Figure 7-1). 3) Check the list on the [Configuration] tab page to see if the TCP/IP and the name of the NIC you are currently<Add> to open the [Select Network Component Type]

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 7 Appendix - TCP/IP Protocol 98 Figure 7-1 Network dialog box 4) Double-click Protocol from the list of [Select Netwobox (or click Protocol and then click <Add…Protocol] dialog box (see Figure 7-2). rk Component Type] dialog >) to open the [Select Network the [Select Network Protocol] ocols list (or click TCP/IP, and then click <OK>) to return to the [Network] dialog box. Then you can see the e installed network components. Figure 7-2 Select Network Component Type dialog box 5) Select Microsoft from the Manufacturers list indialog box, double-click TCP/IP in the Network ProtTCP/IP item in the section listing th

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 7 Appendix - TCP/IP Protocol 99 og box to open the [TCP/IP Properties] ss] tab and select the Obtain an IP nd restart your PC to complete the Figure 7-3 Select Network Protocol dialog box 6) Click <Properties> in the [Network] dialdialog box (see Figure 7-4).Select the [IP addreaddress automatically option. Click <OK> aTCP/IP installation. Figure 7-4 TCP/IP Properties dialog box

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 7 Appendix - TCP/IP Protocol 100 7.2.1 Specif d in section Figure 7-3 to u are running Windows 2000/XP, rol Panel] dialog box. the [Network Connection] ction icon to open the [Local 5). 7.2 Configuring TCP/IP ying to Obtain an IP Address AutomaticallyIf you are running Windows 98/ME/NT, refer to those describespecify to obtain an IP address automatically. If yoperform the following operation. 1) Choose [Start/Settings/Control Panel] to open the [ContDouble-click the Network Connection icon to opendialog box and then double-click the Local ConneArea Connection Status] dialog box (see Figure 7- Figure 7-5 Local Area Connection Status dialog box 2) Click <Properties> to open the [Local Area ConnectionFigure 7-6). Select the [General] tab and select [This connection uses the following items:] section, aopen the [Internet Protocol (TCP/IP) Properties] dial7-7. Properties] dialog box (see Internet Protocol (TCP/IP) in the nd then click <Properties> to og box as shown in Figure

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 7 Appendix - TCP/IP Protocol 101 re 7-6 Local Figu Area Connection Properties 3) On the [General] tab page of the [Internet Protocol (TCP/IP) Properties] dialog box select the Obtain an IP address automatically option and click <OK>. Figure 7-7 Internet Protocol (TCP/IP) Properties dialog box

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 7 Appendix - TCP/IP Protocol 102 7.2.2 Specifying a Fixed IP Address Since the VDR824/824g enables the DHCP by default, the PCs in the LAN can obtain related information dynamically, thus there is no need to assign static IP addresses for PoBy default, the IP address of the Ethernet port of VDR824/824g is 192.168.1.1. Choose any from 192.168.1.2 to 192.168.1.254 to make your PC in the same segment with rocedure suitable for your operating system to specify IP In the [Internet Protocol (TCP/IP) Properties] dialog box (see e the following IP address the corresponding fields and ult IP address of your VDR824/824g , select the [General] tab. Type in the default IP address of your ault gateway] text box and click <OK>. server. Properties] dialog box (see Figure 7-4), select nd type in the default IP address of your DNS server IP address in the corresponding Internet Protocol (TCP/IP) Properties] dialog box (see Figure 7-7) click <Advanced…> to open the [Advanced TCP/IP Configuration] dialog box. Select the [DNS] tab and click <Add…>. Type in the default IP address of the VDR824/824g (192.168.1.1) in the [DNS server] field and click <Add>. 4) Making the settings take effect. z Windows 98/ME/NT: Click <OK> and restart your PC for the above settings to take effect. z Windows 2000/XP: Click <OK> to make the above settings to take effect. Cs in the LAN. But in some cases you still need to configure network settings for some r even all the PCs on a network. 192.168.1.1/24. Follow the paddresses. 1) Specify the IP address of your PC. z Windows 98/ME/NT: In the [TCP/IP Properties] dialog box (see Figure 7-4), select the [IP Address] tab and select the Specify an IP address option. z Windows 2000/XP: Figure 7-7) select the [General] tab, and then the Usoption. Type in the IP address and subnet mask inclick <OK>. 2) Specify the IP address of the gateway. z Windows 98/ME/NT: In the [TCP/IP Properties] dialog box (see Figure 7-4) select the [Gateway] tab. Type in the defa(192.168.1.1) in the [New gateway] text box and click <Add>. z Windows 2000/XP: In the [Internet Protocol (TCP/IP) Properties] dialog box (see Figure 7-7)VDR824/824g (192.168.1.1) in the [Def3) Specify the IP address of the DNS z Windows 98/ME/NT: In the [TCP/IPthe [DNS configuration] tab aVDR824/824g (192.168.1.1) as the field. z Windows 2000/XP: In the [

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 8 Appendix - USB Configuration 103 8.1 Inst. The following nce when running any I. 24g contains the USB driver. II. Plug one end of the USB cable into the USB port of the VDR824/824g, and ector on one end and a square Type B ype B to the 8 Appendix - USB Configuration alling USB Driver Make sure the USB function of your PC operates properly. The Microsoft Windows 98/98 SE/ME/2000/XP supports USB driverinstallation procedure is based on Windows XP. Use it for refereother operating system. Insert the driver CD into the CD-ROM of your PC. The CD that comes with the VDR824/8the other into the USB port of your PC. The USB cable has a rectangular Type A connconnector on the other end. Connect the Type A to your PC and the TVDR824/824g. To ADSL-Ethernet routerTo PC Figure 8-1 USB cable connector

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 8 Appendix - USB Configuration 104 IIxt> to proceed. I. The [Found New Hardware Wizard] dialog box appears (see Figure 8-2). Select the Install the software automatically (Recommended) option and click <Ne Figure 8-2 Find new hardware IV. The PC searches the CD for the driver found, the PC begins to install the driver. configuration file.When this file is Figure 8-3 Install software

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 8 Appendix - USB Configuration 106 z Your VDR824/824g can be a DHCP server to assign IP addresses to PCs in the LAN, so you can specify your PC to obtain IP address automatically. Refer to section 7.2.1 “Specifying to Obtain an IP Address Automatically” for detailed The USB port on the VDR824/824g is preconfigured with these propertieIP address: 192.168.1.1 Subnet mask: 255.255.255.0 ur PC should be configured as the following: IP address: 192.168.1.n (n is an integer ranging from 2 to 254) sk: 255.255.255.0 information. z If you want to specify a fixed IP address to the PC, follow the instructions in section 7.2.2 “Specifying a Fixed IP Address” and use the following information.. s: Therefore, yoSubnet ma

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 9 Appendix - IP Address and Subnet Mask 107 9 Appendix - IP Address and Subnet Mask 9.1 IP Address  Note: z This section refers to the IP address of IPv4 (version 4 of the Internet Protocol) only and the IP address of IPv6 is not covered. z This section describes the basic knowledge of binary numbers, bits, and bytes. An IP address, like the telephone number on the Internet, is used to identify the individual node (a PC or network device) on the Internet. Every IP address contains four sets of numbers, each from 0 to 255 and separated by dots, for example 20.56.0.211.These numbers are called, from left to right, field 1, field 2, field 3, and field 9.1.1 Struontains two components. For instance, the identify a group with thousands of Simi ddress contains two components: z Iden rnet or the intranet. z 4. The representation of four sets of digits separated by dots for IP address is called dotted decimal notation. cture of the IP Address Like a telephone number, the IP address cfirst three digits of a seven-digit telephone number telephone lines, while the last four digits identify a specific line in this group. larly, an IP aNetwork ID tify a specific network segment on the InteHost ID Identify a specific PC or device on the segment.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 9 Appendix - IP Address and Subnet Mask 108 leng ork ID depends on the class of the network (refer to section 9.1.2 “Classes of IP Addresses”). Table 9-1 describes the structure of the IP address. ure of the IP address The starting part of every IP address is the network ID and the rest is the host Dither th of the netwTable 9-1 StructClass Field 1 Field 2 Field 3 Field 4 Class A Network ID Host ID Class B Network ID Host ID Class C Network ID Host ID he following are some valid IP address examples: 9.1.2 Classes of IP Addresses ial use and is ese classes have different uses and llows B network. This kind of etworks and 254 hosts in each class C network. The LANs connecting to the ually of this class networks. Following are the key points about the IP address: z The easiest way to determine the class of an IP address is to look at its number in the field 1: Class A: The number is from 1 to 126. Class B: The number is from 128 to 191. Class C: The number is from 192 to 223. (The numbers for special use are not given here.) TClass A: 10.30.6.125 (network ID = 10, host ID= 30.6.125) Class B: 129.88.16.49 (network ID = 129.88, host ID = 16.49) Class C: 192.60.201.11 (network ID = 192.60.201, host ID = 11) Three common IP addresses are of Cass A, B, and C. (Class D is for specbeyond the scope of this discussion.) Thcharacteristics. The class A network is the largest on the Internet. This allows at least 16 million hosts per network. Such 126 class A networks can hold at least two billion PCs. These enormous networks are quite suitable for the LAN or Internet fundamental organizations such as Internet service provider (ISP). The class B network is relatively smaller than the class A network, but it still a16,384 class B networks and 65,000 hosts in each class network is suitable for the large organizations such as enterprises and governments. The class C network is the smallest one. It allows over two million (2,097,152 exactly) class C nInternet are us

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 9 Appendix - IP Address and Subnet Mask 109 the fields of a host ID can be 0s or 255s as these numbers are reserved for 9.2 Subz Not all special use.net Mask  Note: A network mask looks like a regular IP address and a subnet mask can tell the division of the network ID and the host ID: A bit set to 1 means this bit is part of the network ID nd a bit set to 0 means this bit is part of the host ID. a Subnet masks are used to define subnets (subnets are smaller segments of a large one). A subnet number is a number of bits borrowed from the host portion of IP address. For example, to divide a Class C address 192.168.1.1 into two subnets, you need to set the subnet mask as follows: 255.255.255.128 It is much more straightforward to define the address in binary notation. 11111111. 11111111. 11111111.10000000 For any Class C address, all the bits in the filed 1 through field 3 are part of the network ID, but note how the mask specifies that the first bit in field 4 is also included. Since this extra bit has only two values (0 and 1), this means there are two subnets. Each subnet uses the remaining 7 bits in field 4 for its host IDs, which range from 1 to 126 hosts (instead of the usual 0 to 255 for a Class C address). Similarly, to divide a class C network into four subnets, set the mask as follows: 255.255.255.192 or 11111111. 11111111. 11111111.11000000 The two extra bits in field4 can have four values (00, 01, 10, and 11), so there are four subnets. Each subnet uses the remaining six bits in field 4 for its host IDs, ranging from 1 to 62.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 9 Appendix - IP Address and Subnet Mask 110  Note: Sometimes a subnet mask does not specify any additional network ID bits, and thus no subnets exist. Such a mask is called a default subnet mask. These masks are: z Class A: 255.0.0.0 z Class B: 255.255.0z Class C: 255.255.255.0 They are so called because they are used for asubnets. .0 n initially configured network without

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 10 Appendix - Technical Specifications 111 10 Appendix - Technical Specifications Technical specifications Table 10-1Item Description Ports and buttons One USB port One console port One Reset button to restore the factory default settingsOne power switch Four 10/100Base-TX Ethernet ports Two phone ports One ADSL port Power consumption < 12W Power supply (external) 12 VDC, 1 A Physical dimensions (H x W x D) <37 x 250 x 150 mm (1.5 x 9.8 x 6.0 in.) Weight Approximately 510g (11 oz ) Operating temperature 0°C to 40°C (32°F to 104°F) Storage temperature –10°C to +70°C (14°F to 158°F) Operating humidity (noncondensing) 20% to 85% Storage humidity (noncondensing) 10% to 90% Certification FCC Class B CE

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 11 Appendix - Glossary 112 11 Appendix - Glossary 1 e-TX isted pair cable with the maximum transmission distance of 100 meters 1gory 3/4/5 twisted pair cable with the maximum transmission distance of 150 Ata from the Internet than they upload. ATM private ATM network. The individual ATM segments in the ATM switch cross connect to each other, forming the end-to-end connection. Binary epresent all the numbers. In this system, the decimal digit 1 is represented by 1, 2 by 10, 3 by 11, 4 by 100, and so ugh it is convenient to express numbers in decimal, the IP addresses actually Bridging The data is sent from your network to your ISP and in return your ISP sends the data to the devices on the network by the physical addresses. Compared with routing, bridging 00BasCategory 5 tw(328 ft) and maximum transmission rate of 100 Mbps. 0Base-T Catemeters (492 ft) and the maximum transmission rate of 10 Mbps. DSL Asymmetric digital subscriber line. The most popular flavor of DSL for home users. The term asymmetrical refers to its unequal data rates for download and upload (the download rate is higher than the upload rate).The asymmetrical rate benefits home users because they typically download much more daAsynchronous transfer mode. A technology that uses fixed length packets, called cells, for the packet-switched network. The cell, consisting of a cell header and the text, are switched over a public orThe binary number system just uses two digits, 0 and 1, to ron. Althouse binary numbers. For instance, the IP address 209.191.4.240 is converted into 11010001.10111111.00000100.11110000 in binary.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 11 Appendix - Glossary 113 t more intelligent to transfer data by using network addresses. VDR824/824g BDrotocol. DHCP automates IP address assignment and agement. When a PC connects to the LAN, DHCP assigns it an IP address from a shared address pool, and after a specified period, DHCP returns the address to the Dmic host configuration protocol server. A DHCP server is a computer responsible for assigning IP addresses to the computers in a LAN. Dain name system. The DNS translates domain names into IP addresses. DNS information is distributed hierarchically throughout the Internet among the computers IP ss. If the DNS server cannot find the IP address, it communicates with higher-level DNS servers to determine the IP address. Dain name is a user-friendly name in place of its associated IP address. A domain name must be unique and is controlled by the Internet Corporation for Assigned Names DSL Digital subscriber line. A technology that allows both digital data and analog voice Emakes ican perform both routing and bridging. When both functions are enabled, the VDR824/824g routes IP data and bridges all the other types of data. roadcast A technology used to send data to all the computers on a network. HCP Dynamic host configuration pmanpool. HCP server DynaNS Domcalled DNS servers. For example, www.yahoo.com is the domain name associated with the IP address 216.115.108.243.When you start to access a website, a DNS server looks up the requested domain name and searches for its corresponding addreomain name A domand Numbers (ICANN).A domain name is a key element of a URL which identifies a specific file at a website. signals to travel over the existing copper telephone lines. thernet The most commonly installed computer network technology, usually using the twisted pair cables. The Ethernet data rates are 10 Mbps and 100 Mbps.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 11 Appendix - Glossary 114 all nauthorized users may attempt to attack your network in order u or others on your LAN from the services. Using the firewall, you can block certain types of IP traffic commonly used by hackers to all protection can be provided by packet filtering and network ss translation services. F Web server, downloading files from a Web server. Hl. It is the main protocol used to transfer data between sites so that it can be displayed by Web browser. Het bridge or a router to a ters in a LAN and allowing communication between those devices. ICIEEE Institute of Electrical and Electronics Engineers. It is a technical professional society ss a network ID that identifies the particular ork the host belongs to, and a host ID uniquely identifying the host itself on that network. A network mask is used to define the network ID and the host ID. Because IP FirewA firewall can protect your computer or LAN from malicious attacks and other unexpected accesses. Uto prevent yoprotect your network. You can also restrict the types of IP traffic sent from your network to the outside. Some firewaddreTP File transfer protocol. A program used to transfer files between computers connected to the Internet. Common uses include uploading new or updated files to aand TTP Hypertext transfer protocowebub A hub receives the data from devices and forwards them. It usually performs the switching function by connecting a device such as an Etherngroup of compuMP Internet control message protocol. An Internet protocol used to report errors and other network-related information. The ping command makes use of ICMP. that fosters the development of standards that often become national and international standards. IP addreInternet protocol address. The address of a host (computer) on the Internet, consisting of four decimal numbers, each from 0 to 255, separated by dots, such as 209.191.4.240.An IP address consists of netwaddresses are difficult to remember, they usually have an associated domain name that can be specified instead.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 11 Appendix - Glossary 115 MAC access control address. It is the permanent hardware address of a device, ss. When a computer accesses the Internet, its private IP s translated into a public address of the WAN port. Netlied to an IP address to select the network ID. and ignore the bit set to 0.For example, if the network mask 55.255.0 is applied to the IP address 100.10.50.1, the network ID is 100.10.50, NIC rk interface card. An adapter provides the physical interface for your network Packet t consists of units transmitted on a network are called packets. Each packet Ping ram used to check whether the host associated with an IP address can connect ISP Internet service provider. A company that provides Internet access and charges the customers for services. LAN Local area network. A network limited to a small geographic area, such as a home, office, or small building. Media assigned by its manufacturer. MAC addresses are expressed as six pairs of two hexadecimal digits, separated by hyphens, such as 00-0F-1F-80-65-25. MTU Maximum transmission unit. It is the largest frame size that is transmitted over the physical network. NAT Network address translation. This enables computers in a LAN to access the Internet by sharing the same IP addreaddress iwork mask A network mask is a sequence of bits appSelect the bit set to 1255.2and the host ID is 1. Netwocabling. The Ethernet NIC usually has an RJ-45 connector. Data thaconsists of a header, which contains the information about the source and destination addresses of the packet, and a data field. A progto the network. It can also be used to reveal the IP address for a given domain name.

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 11 Appendix - Glossary 116 P interfaces. The other interface for each VC. Pto-point protocol over Ethernet. One of the two types of PPP interfaces. The other type is PPPoA. You can specify multiple PPPoE interfaces for each VC. Pnnected ends must obey transmit data. RRJ-11 The standard connector used to connect telephones, fax machines, and Modems to a lding four wires. Routing Forwarding data between the local network and the Internet through the most efficient ent network conditions. A ice that performs routing is called a router. Sandard, is ely used in the TCP/IP network. SNMP provides a way to manage the network ort A physical access point on a device such as a computer or router, through which data flows into and out of the device. PPP Point-to-point protocol. It is a communication protocol for data transmission between devices over the standard telephone line. The WAN port on the VDR824/824g uses two types of the PPP, that is, PPPoA and PPPoE. PPPoA Point-to-point protocol over ATM. One of the two types of PPPtype is PPPoE. You can specify only one PPPoAPPoE Point-rotocol A set of rules to govern the data transmission. The two cothese rules toemote A geographically separated location. For example, an employee on travel who logs into the company’s intranet is a remote user. telephone port. It is a 6-pin connector usually hoRJ-45The 8-pin connector used for transmitting data over the telephone lines. Straight-through cables are usually the connector of this type. path, based on the data’s destination IP address and currdevNMP Simple network management protocol (SNMP), a network management stwid

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 11 Appendix - Glossary 117 rough the buted structure administration and proxy. Subnet ak a large by adding additional bits to the host portion of IP address. A host in ysically connected to its host in the network, however, each of them is in TCP/IP col. suite of the basic protocols, not just the TCP/IP protocol, for the network communication. Tteractive, character-based program used to access a remote computer. The HTTP and FTP only allow you to download files from a remote computer, while Telnet allows Tthe noise. In an Ethernet AN, category 3 cable is used for the 10Base-T network while the category 5 cable, the higher level, is used for the 100Base-T network. Upstream The upstream flows from users to the Internet. USB Universal serial bus. A serial interface that attaches the devices such as printers and scanners to the computer. The VDR824/824g provides a USB port to connect a computer. VC Virtual circuit. A connection from the DSL router to the ISP. VCI Virtual channel identifier. Together with the virtual path identifier (VPI), the VCI uniquely identifies a virtual circuit (VC).The ISP provides the VCI value for each VC. VPI nodes from the host located in the center of the network, such as the server, work station, router, bridge, and hub. It usually performs the management thdistriA subnet is a separate part of a network. The subnet mask is used to brenetwork into pieces a subnet is phan individual division of network. Transmission control protocol/internet protoIt defines a elnet An inyou to log into and use a computer from a remote location. wisted pair A common copper cable used for the telephony application. It contains one or more cable pairs twisted together to minimize the interference and L

User Manual Aolynk VDR824 ADSL2+ VoIP Broadband Router/ Aolynk VDR824g ADSL2+ VoIP Wireless Broadband Router 11 Appendix - Glossary 118 Virtual channel identifier. Together with the virtual path identifier (VPI), the VCI uniquely identifies a virtual circuit (VC).The ISP provides the VPI value for each VC. WAN Wide area network. A network covering a large area such as a country or a continent is called a WAN. With respect to the ADSL router, WAN refers to the Internet. Web browser A software program that uses hypertext transfer protocol (HTTP) to download information from (and upload to) websites, and displays the information consisting of text, graphic images, audio, and video. The popular Web browsers are Netscape Navigator and Microsoft Internet Explorer. Web page A website file typically containing text, graphic images and hyperlinks to the other pages. When you access a website, the first displayed page is called the home page. ZIPB Zero installation PPP bridge. This technology ensures that a home user obtains a public IP address through the Modem, and access the Internet without configuring NAT on the Modem or installing the PPP client on the Scathe ZIPB mode becomes active when it is enabled, IPCP negotiation is complete over the WAN PPP link, and a DHCPDISCOVER is received on the Modem LAN interface.