Setting Up and Configuring the Router
Firewall
Cisco RVS4000 Security Router with VPN Administrator Guide 54
5
Firewall > Single Port Forwarding
Application Enter the name of the application you wish to configure.
External Port The port number used by the server or Internet application. Internet
users must connect using this port number. Check with the software
documentation of the Internet application for more information.
Internal Port The port number used by the router when forwarding Internet traffic
to the PC or server on your LAN. Normally, this port number is the same as the
External Port number. If it is different, the router performs a “Port Translation”, so
that the port number used by Internet users is different from the port number used
by the server or Internet application.
For example, you could configure your Web Server to accept connections on both
port 80 (standard) and port 8080. Then enable Port Forwarding, and set the
External Port to 80, and the Intern al Port to 8080. N ow, any traffic from t he Internet
to your Web server uses port 8080, even though the Internet users used the
standard port, 80. (Users on the local LAN can and should connect to your Web
Server using the standard port 80.)
Protocol Select the protocol used for this application, TCP and/or UDP.
IP Address For each application, enter the IP address of the PC running the
specific application.