From Palo Alto Networks ALG Security Technical Implementation Guide
Part of SRG-NET-000213-ALG-000107
Associated with: CCI-001133
Idle sessions can accumulate, leading to an exhaustion of memory in network elements processing traffic flows.
To check global values: Go to Device >> Setup >> Session In the "Session Timeouts" pane, if the TCP field has a value of greater than "900", this is a finding. Obtain the list of authorized applications for the system or network. To check application-specific values: Go to Objects >> Applications Select, in turn, each authorized application. In the "Application" window, in the "Options" pane, view the "TCP" and "UDP Timeout" fields, if the value is greater than "900", this is a finding. Many applications will not have one of these two fields.
To configure the global values: Go to Device >> Setup >> Session In the "Session Timeouts" pane, select the "Edit" icon (the gear symbol in the upper-right corner of the pane). In the "TCP" field, enter "900". Select "OK". To configure application-specific values: Go to Objects >> Applications Select an application name to view additional details about the application. To search for a specific application, enter the "application name" or "description" in the "Search" field. In the "Application" window, in the "Options" pane, in the "TCP Timeout" field, select "Customize". In the Application specific window, in the "TCP" and "UDP Timeout" fields, enter "900" if the existing value is greater than "900". Many applications will not have one of these two fields. Select "OK". Commit changes by selecting "Commit" in the upper-right corner of the screen. Select "OK" when the confirmation dialog appears.
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