Technical information

Watson-SHDSL-Router-GUI-Manual.doc
Version 2.3-03
Watson SHDSL Router
Web-based Management Manual
Revision: 2012-02-29
8-7
Additionally, port forwarding enables you to redirect traffic to a different port instead
of the one to which it was designated. For example, you have a Web server running
on your PC on port 8080 and you want to grant access to this server to anyone who
accesses Watson via HTTP. To accomplish this, you will have to define a port for-
warding rule for the HTTP service, with the PC's IP or host name, as well as specify
8080 in the 'Forward to Port' field. All incoming HTTP traffic will now be forwarded
to the PC running the Web server on port 8080.
When setting a port forwarding service, you must ensure that the port is not already
in use by another application, which may stop functioning.
Note: Some applications, such as FTP, TFTP, PPTP and H323, require the support of
special specific Application Level Gateway (ALG) modules in order to work inside the
home network. Data packets associated with these applications contain information
that allows them to be routed correctly. An ALG is needed to handle these packets
and ensure that they reach their intended destinations. Watson is equipped with a ro-
bust list of ALG modules in order to enable maximum functionality in the home net-
work. The ALG is automatically assigned based on the destination port.
To add a new port forwarding service, perform the following:
 Click 'Port Forwarding' under the Firewall menu. The 'Port Forwarding' screen
appears.
Figure 8-7: Port Forwarding