VIEWSONIC Wireless Media Gateway WMG80 - Manual (Page 44)

ViewSonic Wireless Media Gateway 38
After you click Add to insert new security rule, the Internet Access
Policy Configuration menu appears. Fill in the necessary
information to complete the rule.
Source IP: Select Other if to restrict a certain user (IP address)
access right.
Source Port: The source port here indicates the service port
number for the application, such as Telnet, HTTP and so on.
Destination IP: Select Other if to restrict the service from a
particular remote server.
Destination Port This port number specifies the service required
to the remote server. The port number here is the virtual
connection point through which a computer uses a specific
application on a server.