3Com 3CRWDR200A-75-US - OfficeConnect ADSL Wireless 108 Mbps 11g Firewall Router, Руководство пользователя

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ONFIGURATION
Special Applications
Figure 42 Special Applications Screen
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 to32 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 Add to open the Special Applications screen.
2 Select an application from the drop-down menu or enter the application
name.
3 Enter the Triggered port and the forwarded range in the text boxes.
4 Select the Enabled box to make it activated.