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.

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