Configuring SIP ALG in ScreenOS Devices (NSM Procedure)
To configure SIP ALG:
In the NSM navigation tree, select Device Manager > Devices.
Select a security device and then double-click the device on which you want to modify the ALG section. The device configuration appears.
In the navigation tree, select Advanced > ALGs.
Select Enable SIP ALG.
Click the Show button to expand the SIP settings.
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.
Select IP Attack Protection and specify a Timeout if you want IP attack protection to be enabled.
Click OK to apply your settings.