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Configuring SIP ALG in ScreenOS Devices (NSM Procedure)


To configure SIP ALG:

  1. In the NSM navigation tree, select Device Manager > Devices.

  2. Select a security device and then double-click the device on which you want to modify the ALG section. The device configuration appears.

  3. In the navigation tree, select Advanced > ALGs.

  4. Select Enable SIP ALG.

  5. Click the Show button to expand the SIP settings.

  6. Use the Up or Down Arrow keys to configure the following:

    • Signaling Inactivity Timeout—The default setting is 43,200 seconds (12 hours).

    • Media Inactivity Timeout—The default setting is 120 seconds.

    • Maximum duration a message will remain in network—The default setting is 5 seconds.

    • Round Trip Time Estimate—The default setting is 500 milliseconds.

    • Invite Transaction Timeout—The default setting is 3 minutes.

  7. Select IP Attack Protection and specify a Timeout if you want IP attack protection to be enabled.

  8. Click OK to apply your settings.