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[Archive] How Do I Configure a Policy With the No-Session-Backup Option?



Article ID: KB6835 KB Last Updated: 30 Jul 2010Version: 5.0

How Do I Configure a Policy With the No-Session-Backup Option?



  • Valid for Serial
  • no-session-backup

note:This article applies to ScreenOS 4.0.0-DIAL, 4.0.0-DIAL2, and 5.0.

The "valid for serial", or "no-session-backup" option is applicable only on policies between the trust and untrust zones. When a fail-over occurs, due to bandwidth constrictions, an administrator may want only critical services to be allowed. An example of this is allowing SMTP and specific HTTP policies. For all other policies, the policy lookup will skip them if the "no-session-backup" option is enabled.


To configure a policy with the no-session-backup option, perform the following steps:

Open the Command Line Interface. For more information on accessing the Command Line Interface, go to Accessing the Command Line Interface Using Telnet.

From the command line, create a policy using the "no-session-backup" option. For example:

 set policy from trust to untrust any any any permit no-session-backup

´┐Żnote: This can also be performed in the WebUI.   In the WebUI, the option can be disabled using the "valid for serial" advanced policy option.



To disable the "valid for serial" option in the WebUI, perform the following steps:

Open the WebUI. For more information on accessing the WebUI, go to Accessing Your NetScreen Using the WebUI.

From the NetScreen options menu, click Policies.

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Locate the policy that you wish to edit, and then click Edit.

Image of step three

Click Advanced.

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Click to clear Valid for Serial.

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Click OK.

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