Chapter 4. Customizing Your Network Settings
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55
N150 Wireless Router WGR614v11 User Manual
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.
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
59.
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
1
92.168.1.100.
•
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.
