Netgear G Router Wgr614v9 Manual

							Wireless-G Router WGR614v9 Reference Manual
Customizing Your Network Settings 4-3
v1.1, May 2008
Specify the pool of IP addresses to be assigned by setting the starting IP address and ending IP 
address. These addresses should be part of the same IP address subnet as the router’s LAN IP 
address. Using the default addressing scheme, you should define a range between 192.168.1.2 and 
192.168.1.254, although you might wish to save part of the range for devices with fixed addresses.
The router delivers the following parameters to any LAN device that requests DHCP:
• An IP address from the range you have defined
• Subnet mask
• Gateway IP address (the router’s LAN IP address)
• Primary DNS server (if you entered a primary DNS address in the Basic Settings screen; 
otherwise, the router’s LAN IP address)
• Secondary DNS server (if you entered a secondary DNS address in the Basic Settings screen)
To use another device on your network as the DHCP server, or to manually specify the network 
settings of all of your computers, clear the Use Router as DHCP Server check box. Otherwise, 
leave it selected. If this service is not selected and no other DHCP server is available on your 
network, you need to set your computers’ IP addresses manually or they will not be able to access 
the router.
Using Address Reservation
When you specify a reserved IP address for a computer on the LAN, that computer always 
receives the same IP address each time it accesses the router’s DHCP server. Reserved IP 
addresses should be assigned to computers or servers that require permanent IP settings. 
To reserve an IP address: 
1.Click Add. 
2.In the IP Address field, type the IP address to assign to the computer or server. (Choose an IP 
address from the router’s LAN subnet, such as 192.168.1.x.) 
3.Type the MAC address of the computer or server.
Tip: If the computer is already present on your network, you can copy its MAC 
address from the Attached Devices screen and paste it here. 
						

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4.Click Apply to enter the reserved address into the table. 
To edit or delete a reserved address entry: 
1.Click the button next to the reserved address you want to edit or delete. 
2.Click Edit or Delete.
Using a Dynamic DNS Service
If your Internet Service Provider (ISP) gave you a permanently assigned IP address, you can 
register a domain name and have that name linked with your IP address by public Domain Name 
Servers (DNS). However, if your Internet account uses a dynamically assigned IP address, you do 
not know in advance what your IP address will be, and the address can change frequently. In this 
case, you can use a commercial Dynamic DNS service, which allows you to register your domain 
to their IP address, and forwards traffic directed at your domain to your frequently changing IP 
address.
Your router contains a client that can connect to the Dynamic DNS service provided by 
DynDNS.org. You must first visit their website at www.dyndns.org and obtain an account and host 
name, which you specify in the router. Then, whenever your ISP-assigned IP address changes, 
your router automatically contacts the Dynamic DNS service provider, logs in to your account, and 
registers your new IP address. If your host name is hostname, for example, you can reach your 
router at hostname.dyndns.org.
Note: The reserved address is not assigned until the next time the computer contacts 
the router’s DHCP server. Reboot the computer or access its IP configuration 
and force a DHCP release and renew.
Note: If your ISP assigns a private WAN IP address (such as 192.168.x.x or 10.x.x.x), the 
Dynamic DNS service will not work because private addresses are not routed on 
the Internet. 
						

							Wireless-G Router WGR614v9 Reference Manual
Customizing Your Network Settings 4-5
v1.1, May 2008
From the main menu of the browser interface, under Advanced, select Dynamic DNS to display 
the Dynamic DNS screen.
To configure Dynamic DNS:
1.Register for an account with one of the Dynamic DNS service providers whose names appear 
in the Service Provider list. For example, for DynDNS.org, select www.dyndns.org.
2.Select the Use a Dynamic DNS Service check box. 
3.Select the name of your Dynamic DNS service provider. 
4.Type the host name (or domain name) that your Dynamic DNS service provider gave you.
5.Type the user name for your Dynamic DNS account. This is the name that you use to log in to 
your account, not your host name.
6.Type the password (or key) for your Dynamic DNS account. 
7.If your Dynamic DNS provider allows the use of wildcards in resolving your URL, you can 
select the Use Wildcards check box to activate this feature. 
For example, the wildcard feature causes *.yourhost.dyndns.org to be aliased to the same IP 
address as yourhost.dyndns.org.
8.Click Apply to save your configuration.
Figure 4-2 
						

							Wireless-G Router WGR614v9 Reference Manual
4-6 Customizing Your Network Settings
v1.1, May 2008
Configuring the WAN Setup Options
The WAN Setup options let you configure a DMZ (demilitarized zone) server, change the 
Maximum Transmit Unit (MTU) size, and enable the wireless router to respond to a ping on the 
WAN (Internet) port. From the main menu of the browser interface, under Advanced, click WAN 
Setup to view the WAN Setup screen.
Disabling the SPI Firewall 
The Stateful Packet Inspection (SPI) firewall protects your network and computers against attacks 
and intrusions. A stateful packet firewall carefully inspects incoming traffic packets, looking for 
known exploits such as malformed, oversized, or out-of-sequence packets. The firewall should be 
disabled only in special circumstances, such as when you are troubleshooting application issues.
Setting Up a Default DMZ Server
The default DMZ server feature is helpful when you are using some online games and 
videoconferencing applications that are incompatible with Network Address Translation (NAT). 
The router is programmed to recognize some of these applications and to work correctly with 
Figure 4-3 
						

							Wireless-G Router WGR614v9 Reference Manual
Customizing Your Network Settings 4-7
v1.1, May 2008
them, but there are other applications that might not function well. In some cases, one local 
computer can run the application correctly if that computer’s IP address is entered as the default 
DMZ server.
Incoming traffic from the Internet is usually discarded by the router unless the traffic is a response 
to one of your local computers or a service that you have configured in the Port Forwarding/Port 
Triggering screen. Instead of discarding this traffic, you can have it forwarded to one computer on 
your network. This computer is called the default DMZ server.
The WAN Setup screen lets you configure a default DMZ server.
To assign a computer or server to be a default DMZ server: 
1.In the last Default DMZ Server field, type the last digit of the IP address for that computer. 
To remove the default DMZ server, enter 0 (zero).
2.Select the Default DMZ Server check box, and click Apply.
Responding to a Ping on the Internet (WAN) Port
If you want the router to respond to a ping from the Internet, select the Respond to Ping on 
Internet Port check box. This should be used only as a diagnostic tool, since it allows your router 
to be discovered by Internet scanners. Do not select this check box unless you have a specific 
reason to do so, such as when troubleshooting your connection.
Setting the MTU Size
The normal MTU value for most Ethernet networks is 1500 bytes, 1492 bytes for PPPoE 
connections, or 1450 for PPTP connections. For some ISPs, you might need to reduce the MTU 
size, but this is rarely required and should not be done unless you are sure it is necessary for your 
ISP connection. For more information, see “Changing the MTU Size” on page 5-15.
To change the MTU size:
1.In the MTU Size field, enter a new size between 64 and 1500.
2.Click Apply to save the new configuration.
Wa r n i n g :  DMZ servers pose a security risk. A computer designated as the default DMZ 
server loses much of the protection of the firewall, and is exposed to exploits 
from the Internet. If compromised, the DMZ server computer can be used to 
attack other computers on your network. 
						

							Wireless-G Router WGR614v9 Reference Manual
4-8 Customizing Your Network Settings
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Configuring NAT Filtering
Network Address Translation (NAT) determines how the router processes inbound traffic. Secured 
NAT provides a secured firewall to protect the computers on the LAN from attacks from the 
Internet, but might prevent some Internet games, point-to-point applications, or multimedia 
applications from functioning. Open NAT provides a much less secured firewall, but allows almost 
all Internet applications to function. For more information about NAT, see “How Your Computer 
Accesses a Remote Computer through Your Router” on page 5-2.
To change the NAT option:
1.In the NAT Filtering area, select either the Secured or the Open radio button.
2.Click Apply to save the new configuration.
Configuring Static Routes
Static routes provide additional routing information to your router. Under usual circumstances, the 
router has adequate routing information after it has been configured for Internet access, and you do 
not need to configure additional static routes. You must configure static routes only for unusual 
cases such as multiple routers or multiple IP subnets located on your network.
As an example of when a static route is needed, consider the following case:
• Your primary Internet access is through a cable modem to an ISP.
• You have an ISDN router on your home network for connecting to the company where you are 
employed. This router’s address on your LAN is 192.168.1.100.
• Your company’s network address is 134.177.0.0.
When you first configured your router, two implicit static routes were created. A default route was 
created with your ISP as the gateway, and a second static route was created to your local network 
for all 192.168.1.x addresses. With this configuration, if you attempt to access a device on the 
134.177.0.0 network, your router forwards your request to the ISP. The ISP forwards your request 
to the company where you are employed, and the request is likely to be denied by the company’s 
firewall.
In this case you must define a static route, telling your router that 134.177.0.0 should be accessed 
through the ISDN router at 192.168.1.100. 
In this example:
•The Destination IP Address and IP Subnet Mask fields specify that this static route applies 
to all 134.177.x.x addresses.  
						

							Wireless-G Router WGR614v9 Reference Manual
Customizing Your Network Settings 4-9
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•The Gateway IP Address field specifies that all traffic for these addresses should be 
forwarded to the ISDN router at 192.168.1.100. 
•A Metric value of 1 will work since the ISDN router is on the LAN. 
•Private is selected only as a precautionary security measure in case RIP is activated.
Select Sta tic Routes under Advanced in the main menu. The Static Routes screen displays.
To add or edit a static route:
1.Click Add to expand the Static Routes screen.
2.In the Route Name field, type a name for this static route. (This is for identification purposes 
only.) 
3.Select the Private check box if you want to limit access to the LAN only. If Private is selected, 
the static route is not reported in RIP. 
4.Select the Active check box to make this route effective. 
Figure 4-4
Figure 4-5 
						

							Wireless-G Router WGR614v9 Reference Manual
4-10 Customizing Your Network Settings
v1.1, May 2008
5.Type the IP address of the final destination. 
6.Type the IP subnet mask for this destination.
If the destination is a single host, type 255.255.255.255. 
7.Type the gateway IP address, which must be a router on the same LAN segment as the 
Wireless-G Router. 
8.Type a number between 1 and 15 as the metric value. 
This represents the number of routers between your network and the destination. Usually, a 
setting of 2 or 3 works, but if this is a direct connection, set it to 1. 
9.Click Apply to have the static route entered into the table.
Wireless Repeating (Also Called WDS)
The Wireless-G Router can be used with a wireless access point (AP) to build large bridged 
wireless networks. Wireless repeating is a type of Wireless Distribution System (WDS).
The following figure shows a wireless repeating scenario: 
Wa r n i n g :  If you use the wireless repeating function, your options for wireless security 
are limited to None or WEP. For more information about wireless security, see 
Chapter 2, “Safeguarding Your Network.”
Figure 4-6
Wireless Router (AP 1)
Internet
PCs
AP 2 is in Repeater mode. This wireless computer is
associated with AP 2. This wireless computer is
associated with AP 1.
Modem
is in Wireless Base Station mode. 
						

							Wireless-G Router WGR614v9 Reference Manual
Customizing Your Network Settings 4-11
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In the scenario shown, the following conditions must be met for both APs:
• Both APs must use the same SSID, wireless channel, and encryption mode (see information 
about WEP in “Configuring WEP Wireless Security” on page 2-7”).
• Both APs must be on the same LAN IP subnet. That is, all the AP LAN IP addresses are in the 
same network.
• All LAN devices (wired and wireless computers) must be configured to operate in the same 
LAN network address range as the APs.
Wireless Repeating Function
You can view or change wireless repeater settings for the wireless router. From the main menu of 
the browser interface, under Advanced, click Wireless Repeating Function to display the 
Wireless Repeating Function screen.
The wireless router supports two modes of the wireless repeating function, and allows you to 
control wireless client association:
•Wireless Base Station mode. The wireless router acts as the parent AP, bridging traffic to and 
from the child repeater AP, as well as handling wireless and wired local computers. To 
configure this mode, you must know the MAC addresses of the child repeater AP.
•Wireless Repeater mode. The wireless router sends all traffic from its local wireless or wired 
computers to a remote AP. To configure this mode, you must know the MAC address of the 
remote parent AP. 
•Disable Wireless Client Association. Usually this check box is cleared so that the router is an 
access point for wireless computers. 
Figure 4-7 
						

							Wireless-G Router WGR614v9 Reference Manual
4-12 Customizing Your Network Settings
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If this check box is selected, the router communicates wirelessly only with other APs whose 
MAC addresses are listed in this screen. The router still communicates with wire-connected 
LAN devices. 
Setting Up the Base Station
The wireless repeating function works only in hub and spoke mode. The units cannot be daisy 
chained. You must know the wireless settings for both units. You must know the MAC address of 
the remote unit. First, set up the base station, and then set up the repeater. 
To set up the base station:
1.Set up both units with exactly the same wireless settings (SSID, mode, channel, and security). 
Note that the wireless security option must be set to None or WEP.
2.From the main menu of the browser interface on the wireless router base unit, under 
Advanced, click Wireless Repeating Function to display the Wireless Repeating Function 
screen.
3.Select the Enable Wireless Repeating Function check box and the Wireless Base Station 
radio button.
4.Enter the MAC address for the repeater units.
5.Click Apply to save your changes.
Figure 4-8