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Assessment Title
Rule Text
The Juniper SRX Services Gateway Firewall must terminate all communications sessions associated with user traffic after 15 minutes or less of inactivity.
Description
Discussion Text
Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle session will also free up resources committed by the managed network element.
This control does not imply that the device terminates all sessions or network access; it only ends the inactive session.
Since many of the inactivity timeouts pre-defined by Junos OS are set to 1800 seconds, an explicit custom setting of 900 must be set for each application used by the DoD implementation. Since a timeout cannot be set directly on the predefined applications, the timeout must be set on the any firewall rule that uses a pre-defined application (i.e., an application that begins with junos-), otherwise the default pre-defined timeout will be used.
This control does not imply that the device terminates all sessions or network access; it only ends the inactive session.
Since many of the inactivity timeouts pre-defined by Junos OS are set to 1800 seconds, an explicit custom setting of 900 must be set for each application used by the DoD implementation. Since a timeout cannot be set directly on the predefined applications, the timeout must be set on the any firewall rule that uses a pre-defined application (i.e., an application that begins with junos-), otherwise the default pre-defined timeout will be used.
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