User guide

92 Chapter 4. Configuring Special Features

¥ Obtain an IP Address for NAT

The IP address (the IP address ÒknownÓ by the remote ISP) used for this type of NAT can be assigned in

two ways.

The ISP dynamically assigns the IP address. Use the commands:

remote setSrcIpAddr 0.0.0.0 0.0.0.0 <remoteName>

save

The IP address is assigned locally. Use the commands:

remote setSrcIpAddr ww.xx.yy.zz 255.255.255.255 <remoteName>

save

Note: ww.xx.yy.zz is the IP address that the user on the local LAN assigns.

Server Configuration

This section is intended for users and network administrators who wish to allow WAN access to a Web

server, FTP server, SMTP server, etc., on their local LAN, while using NAT.

NAT needs a way to identify which local PC [local IP address(es)] should receive these server requests.

The servers can be configured on a per-remote-router basis as well as globally.

¥ Remote Commands

The following two commands are used to enable/disable a local IP address (on your LAN) as the server

for a particular protocol for the remote router <remoteName>.

[<last port>[<first private port>]] <remoteName>

[<last port>[<first private port>]] <remoteName>

where

first port: this is the first or only port as seen by the remote end.

last port: if specified, this is used with <first port> to specify a range of ports as seen by the remote end

for the server on your LAN.

first private port: if specified, this is a port remapping of the incoming request from the remote end.

first port maps to first private port.

first port + 1 maps to first private port + 1.

last port maps to first private port + last port - first port

first port through last port are the ports as seen by the remote end.

first private port through first private port + last port - first port are the equivalent ports through which

the server on your local LAN will receive the request.

This command is used to view all of the remote entries, including the changes.

remote list <remoteName>

Remember to type save to make the changes persistent across boots.