STIGQter: STIG Summary: F5 BIG-IP TMOS ALG Security Technical Implementation Guide Version: 1 Release: 3 Benchmark Date: 01 Jul 2026:

The F5 BIG-IP appliance providing content filtering must generate a log record when unauthorized network services are detected.

DISA Rule

SV-266161r1024391_rule

Vulnerability Number

V-266161

Group Title

SRG-NET-000385-ALG-000137

Rule Version

F5BI-AP-300069

Severity

CAT II

CCI(s)

• CCI-002684 - Audit and/or alert organization-defined personnel when unauthorized network services are detected.

Weight

10

Fix Recommendation

AFM ACL:
From the BIG-IP GUI:
1. Security.
2. Network Firewall.
3. Policies.
4. <Policy Name>.
5. Configure a rule that uses a "Classification Policy".
Note: To create a Classification Policy, go to Traffic Intelligence >> Policies.
6. Click "Commit Changes to System".

Log Profile:
From the BIG-IP GUI:
1. Security.
2. Event Logs.
3. Logging Profiles.
4. Edit the global-network profile.
5. Check "Enabled" for "Classification".
6. Classification tab.
7. Configure the Log Publisher. (For production environments, F5 recommends using remote logging.)
8. Click "Update".

Check Contents

If the BIG-IP appliance does not perform content filtering as part of the traffic management functions, this is not applicable.

If using the BIG-IP AFM module to perform content filtering:

AFM ACL:
From the BIG-IP GUI:
1. Security.
2. Network Firewall.
3. Policies.
4. <Policy Name>.
5. Verify a rule is configured that uses a "Classification Policy".

Log Profile:
From the BIG-IP GUI:
1. Security.
2. Event Logs.
3. Logging Profiles.
4. Edit the global-network profile.
5. Classification tab.
6. Verify the Log Publisher is set to the desired setting. (For production environments, F5 recommends using remote logging.)

If configured rules in the policy do not detect use of network services that have not been authorized or approved by the ISSM and ISSO, at a minimum, this is a finding.

Vulnerability Number

V-266161

Documentable

False

Rule Version

F5BI-AP-300069

Severity Override Guidance

If the BIG-IP appliance does not perform content filtering as part of the traffic management functions, this is not applicable.

If using the BIG-IP AFM module to perform content filtering:

AFM ACL:
From the BIG-IP GUI:
1. Security.
2. Network Firewall.
3. Policies.
4. <Policy Name>.
5. Verify a rule is configured that uses a "Classification Policy".

Log Profile:
From the BIG-IP GUI:
1. Security.
2. Event Logs.
3. Logging Profiles.
4. Edit the global-network profile.
5. Classification tab.
6. Verify the Log Publisher is set to the desired setting. (For production environments, F5 recommends using remote logging.)

If configured rules in the policy do not detect use of network services that have not been authorized or approved by the ISSM and ISSO, at a minimum, this is a finding.

Check Content Reference

M

Target Key

5640