3Com OfficeConnect User Manual page 53

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 an outgoing trigger which tells the
Router''s firewall that the application has started and to allow the
incoming connections.
Each defined Special Application only supports a single computer
user and any incoming ports opened by a Special Application
trigger will be closed after 20 minutes of inactivity for TCP/IP
connections or 10 for UDP/IP connections.
For each special application configured by the Router, a row is
added to the table. Each row contains the following items:
Delete button — Deletes the special application on that row.
This will prevent the Router's firewall from opening to that
connection.
Authorized Applications — Each special application is named.
This name is not used by the Router and is only to enable you
to identify the connection. Clicking the name of a connection
displays the Special Application Setup screen. See
and Editing Special Applications"
Trigger Port — This is the TCP/IP port number that the Router
uses to recognize that the application has started.
Additionally there are two buttons outside the table:
Help — displays the online help page for this screen.
New — creates a new special application. See
Editing Special Applications"
"Adding
below.
"Adding and
below.
Adding and Editing Special Applications
Click on the New button to create a new special application or
1
on the name of a special application to edit the settings for that
application.
Figure 51 Special Application Settings Screen
Select the applications from the Choose Application drop-down
2
box. See Figure 51. If the application you want to define is not in
the list select Custom and see
Applications" below.
Click Add to add the special application to the list of protocols or
3
Close to abort your selection and return to the Special
Applications screen.
Depending on the settings you have made in PC Privileges the
Special Application you have defined may not be allowed across
the Router. See "PC Privileges"
Creating Custom Special Applications
If your special application is not listed in the Choose Application
drop-down box you can still configure it manually. Select Custom
from the Choose Application drop-down box and the Special
53
"Creating Custom Special
on page 50.