The F5 BIG-IP appliance must terminate all network connections associated with a communications session at the end of the session or after 15 minutes of inactivity.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-266155 | F5BI-AP-300056 | SV-266155r1024382_rule | High |
| Description |
| 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. Quickly terminating an idle session will also free up resources committed by the managed network element. Terminating network connections associated with communications sessions includes, for example, deallocating associated TCP/IP address/port pairs at the operating system level and deallocating networking assignments at the application level if multiple application sessions are using a single operating system-level network connection. ALGs may provide session control functionality as part of content filtering, load balancing, or proxy services. |
| STIG | Date |
| F5 BIG-IP TMOS ALG Security Technical Implementation Guide | 2025-06-09 |
Details
| Check Text (C-70079r1023711_chk) |
| From the BIG-IP GUI: 1. Access. 2. Profiles/Policies. 3. Access Profiles. 4. Click the name of the Access Profile. 5. Verify "Inactivity Timeout" is configured for 900 seconds. If the BIG-IP appliance is not configured to terminate all network connections associated with a user (nonprivileged) communications session after 15 minutes of inactivity, this is a finding. |
| Fix Text (F-69982r1023712_fix) |
| From the BIG-IP GUI: 1. Access. 2. Profiles/Policies. 3. Access Profiles. 4. Click the name of the Access Profile. 5. Set "Inactivity Timeout" to 900 seconds. Note: If the setting is grayed out, check the box to the right of the setting. 6. Click "Update". |