Configuring Port Range Forwarding - Cisco QuickVPN - PC Administration Manual

Setting Up and Configuring the WRVS4400N Wireless-N Router
Configuring Firewall Settings
STEP 3
Cisco WRVS4400N Wireless-N Gigabit Security Router with VPN Administration Guide
• Internal Port—Port number used by the router when forwarding Internet
traffic to the personal computer or server on your LAN and is usually 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, set
the External Port to 80 and the Internal Port to 8080.
Now, any traffic from the 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 or UDP.
• IP Address—For each application, enter the IP address of the personal
computer running the specific server application.
• Enabled—Select Enabled to enable port forwarding for the relevant server
application.
Click Save.

Configuring Port Range Forwarding

The Firewall > Port Range Forwarding window displays the settings associated
with public services accessed on your network that use single or multiple port
numbers, such as web servers, FTP servers, e-mail servers, or other specialized
Internet applications that use one or multiple port numbers (for example, video
conferencing). Port Range Forwarding is one of the NAPT (Network Address Port
Translation) features.
The Port Range Forwarding window allows you to configure access to these
public services on your network. The port numbers being used does not change
while forwarding to the local network. This allows users on the Internet to access
this server by using the WAN port IP address and the pre-defined port numbers.
When users send these types of requests to your WAN port IP address via the
Internet, the NAT router forwards those requests to the appropriate servers on
your LAN.
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