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Page 61 / 128 Scroll up to view Page 56 - 60
NETGEAR RangeMax™ NEXT Wireless Router WNR834B User Manual
Customizing Your Network Settings
4-5
v2.1, July 2007
Using a Dynamic DNS Service
If your Internet Service Provider (ISP) gives 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 will allow you to register your
domain to their IP address, and will forward 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 will configure in the router. Then, whenever your ISP-assigned IP address
changes, your router will automatically contact the dynamic DNS service provider, log in to your
account, and register your new IP address. If your host name is
hostname
, you will be able to reach
your router at
hostname.dyndns.org
.
From the main menu of the browser interface, under Advanced, click on Dynamic DNS to view
the Dynamic DNS menu.
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.
Figure 4-2
Page 62 / 128
NETGEAR RangeMax™ NEXT Wireless Router WNR834B User Manual
4-6
Customizing Your Network Settings
v2.1, July 2007
To configure Dynamic DNS:
1.
Register for an account with one of the dynamic DNS service providers whose names appear
in the Select Service Provider box. For example, for DynDNS.org, go to
www.dyndns.org
.
2.
Select the checkbox for Use a Dynamic DNS Service.
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 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 checkbox to activate this feature.
For example, the wildcard feature will cause
*.yourhost.dyndns.org
to be aliased to the same
IP address as
yourhost.dyndns.org
.
8.
Click Apply to save your configuration.
Configuring the WAN Setup Options
The WAN Setup options let you configure a DMZ (De-Militarized Zone) server, change the
Maximum Transmit Unit (MTU) size, and enable the wireless router to respond to a ping on the
WAN port. From the main menu of the browser interface, under Advanced, click WAN Setup to
view the WAN Setup menu.
Figure 4-3
Page 63 / 128
NETGEAR RangeMax™ NEXT Wireless Router WNR834B User Manual
Customizing Your Network Settings
4-7
v2.1, July 2007
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
only be disabled in special circumstances, such as when troubleshooting application issues.
Setting Up a Default DMZ Server
The default DMZ server feature is helpful when 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 properly with them, but there are
other applications that may not function well. In some cases, one local computer can run the
application properly if that computer’s IP address is entered as the default DMZ server.
Incoming traffic from the Internet is normally 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 menu. 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 menu lets you configure a Default DMZ Server.
To assign a computer or server to be a Default DMZ server:
1.
In the main menu, under Advanced, click WAN Setup.
2.
Under Default DMZ Server, type the last digit of the IP address for that computer. To remove
the default DMZ server, enter zero.
3.
Select the checkbox for Default DMZ Server 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 checkbox for Respond to
Ping on Internet WAN Port. This should only be used as a diagnostic tool, since it allows your
router to be discovered by Internet scanners. Do not select this checkbox unless you have a
specific reason to do so, such as when troubleshooting your connection.
Warning:
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.
Page 64 / 128
NETGEAR RangeMax™ NEXT Wireless Router WNR834B User Manual
4-8
Customizing Your Network Settings
v2.1, July 2007
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 may need to reduce the MTU, 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” on page 5-20
.
To change the MTU size:
1.
Under MTU Size, enter a new size between 64 and 1500.
2.
Click Apply to save the new configuration.
Configuring Static Routes
Static routes provide additional routing information to your router. Under normal 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.
From the main menu of the browser interface, under Advanced, click Static Routes to view the
Static Routes menu.
To add or edit a static route:
Figure 4-4
Page 65 / 128
NETGEAR RangeMax™ NEXT Wireless Router WNR834B User Manual
Customizing Your Network Settings
4-9
v2.1, July 2007
1.
Click Add to open the Add Static Routes menu.
2.
In the Route Name box, type a name for this static route.
(This is for identification purposes only.)
3.
Select the Private checkbox if you want to limit access to the LAN only.
If Private, the static route will not be reported in RIP.
4.
Select the Active checkbox to make this route effective.
5.
Type the Destination 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
WNR834B.
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.
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
1
92.168.1.100.
•
Your company’s network address is 134.177.0.0.
Figure 4-5

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