3Com OfficeConnect 3CRWE554G72, User Manual, Page: 66 / 126

66 C
HAPTER
5: G
ATEWAY
C
ONFIGURATION
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 New .
2 Select the applications from the pull-down list. ( Figure 49 )
Figure 49 Special Application Settings Screen
Or select Other to specify a suitable name for the special application and
then enter a value in the Trigger Port and Incoming Ports text boxes
( Figure 49 ). These values correspond to the outbound port numbers
issued by the application.
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.
The Gateway will automatically allow FTP and NetMeeting sessions. You
do not need to configure these as Special Applications.