3Com OfficeConnect 3CR856-95 User Manual

Also see for OfficeConnect 3CR856-95: Installation guide User guide

Contents

47VPN connections to other networks are unaffected by settings inPC Privileges. To allow or deny VPN connections to othernetworks see “Configuring VPN” on page 50.Special ApplicationsSelect Special Applications tab to display the AuthorizedApplication setup screen. See Figure 43 below.Figure 43 Special Applications ScreenSome software applications need a connection to be started fromthe Internet — an act that is usually blocked by the Gateway’sfirewall.So that these special applications can work properly and are notblocked, the firewall needs to be told about them. In eachinstance there will be an outgoing trigger which tells theGateway’s firewall that the application has started and to allowthe incoming connections.Each defined Special Application only supports a single computeruser and any incoming ports opened by a Special Applicationtrigger will be closed after 20 minutes of inactivity for TCP/IPconnections or 10 for UDP/IP connections.For each special application configured by the Gateway, a row isadded to the table. Each row contains the following items: Delete button — Deletes the special application on that row.This will prevent the Gateway’s firewall from opening to thatconnection. Name — Each special application is named. This name is notused by the Gateway and is only to enable you to identify theconnection. Clicking the name of a connection displays theSpecial Application Setup screen. See “Adding and EditingSpecial Applications” below. Trigger Port — This is the TCP/IP port number that theGateway uses to recognise that the application has started.Additionally there are three buttons outside the table: Help — displays the online help page for this screen. New — creates a new special application. See “Adding andEditing Special Applications” below.Adding and Editing Special Applications1 Click on the New button to create a new special application oron the name of a special application to edit the settings for thatapplication.dua08569-5aaa01.book Page 47 Wednesday, March 13, 2002 10:39 AM