User's Manual

Firewall 45
Or Select Custom to specify a suitable name for the service and then enter the port
numbers required for that service. (Figure 43)
Figure 43 Custom Setup Screen
4 Click Add button to save the settings.
The port numbers are specified using a comma-separated list, with hyphens to
denote port number ranges. So for example, entering 2, 3, 5-7 would cause ports
2, 3, 5, 6, and 7 to be activated.
Special Applications
Figure 44 Special Applications Screen
Select Special Applications tab to display Authorized Application setup screen.
(Figure 44)
Some software applications require special or multiple connections to the Internet
and these would normally be blocked by the Firewall. For example Internet
Telephony or Video conferences require multiple connections.
So that these special applications can work properly and are not blocked, the
firewall needs to be told about them. In each instance there will be a trigger port
and incoming port(s), where traffic on the trigger port tells the Firewall to open
the incoming ports.
Each defined Special Application only supports a single computer user, and up to
10 Special Applications can be defined. Any incoming ports opened by a Special
Application trigger will be closed after five minutes of inactivity.
To configure special applications:
1 Click on the New button.
2 Select the applications from the pull-down list. (Figure 45)