The F5 BIG-IP appliance must generate traffic log entries containing information to establish the details of the event, including success or failure of the application of the firewall rule.

Without establishing what type of event occurred, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack.

Audit event content that may be necessary to satisfy this requirement includes, for example, time stamps, source and destination addresses, user/process identifiers, event descriptions, success/fail indications, filenames involved, and access control or flow control rules invoked.

Associating event types with detected events in the network element logs provides a means of investigating an attack, recognizing resource utilization or capacity thresholds, or identifying an improperly configured network element.

Satisfies: SRG-NET-000074-FW-000009, SRG-NET-000075-FW-000010, SRG-NET-000076-FW-000011, SRG-NET-000077-FW-000012, SRG-NET-000078-FW-000013, SRG-NET-000492-FW-000006, SRG-NET-000493-FW-000007, SRG-NET-000333-FW-000014

From the BIG-IP GUI: 1. Security. 2. Event Logs. 3. Logging Profiles. 4. Edit the global-network profile. 5. Network Firewall tab. 6. Select a Log Publisher to use (for production environments, use Remote High Speed Logging). 7. Verify at least the "Accept", "Drop", and "Reject" Log Rule Matches boxes are checked, along with any other settings to be enabled.

From the BIG-IP Console, type the following commands:

tmsh list security log profile global-network

Note: Verify the log-acl-match-accept, log-acl-match-drop, and log-acl-match-reject settings are enabled.

If the BIG-IP is not configured to generate traffic log entries containing information to establish the details of the event, including success or failure of the application of the firewall rule, this is a finding.

From the BIG-IP GUI: 1. Security. 2. Event Logs. 3. Logging Profiles. 4. Edit the global-network profile. 5. Network Firewall tab. 6. Select a Log Publisher to use (for production environments, use Remote High Speed Logging). 7. Check the "Accept", "Drop", and "Reject" Log Rule Matches boxes are checked, along with any other settings to be enabled. 8. Click "Update".

From the BIG-IP Console, type the following commands:

tmsh modify security log profile global-network network modify { all { filter { log-acl-match-accept enabled log-acl-match-drop enabled log-acl-match-reject enabled } publisher <publisher name> } } tmsh save sys config

Refer to vendor documentation for more information.