TMA-F5-BIGIP-5.3
Ensure port lockdown for self IP is set
Description
to secure the BIG-IP system from unwanted connection attempts on self-IP. FAILs if any self IP has allow-service all or default (Port Lockdown must be Allow None or Allow Custom). Audited against tmsh output with defaults shown: save the concatenated output of 'tmsh list auth password-policy all-properties', 'tmsh list auth source all-properties', 'tmsh list auth remote-user all-properties', 'tmsh list auth radius all-properties', 'tmsh list sys httpd all-properties', 'tmsh list sys sshd all-properties', 'tmsh list sys global-settings all-properties', 'tmsh list cli global-settings all-properties', 'tmsh list sys ntp', 'tmsh list sys snmp all-properties', 'tmsh list sys syslog' and 'tmsh list net self all-properties'. Patterns are scoped to the named top-level block.
How it is checked
Audit method: Configuration pattern
- Pattern
(?m)^net self \S+ \{\n(?:[ \t]+[^\n]*\n)*?[ \t]+allow-service (?:all|default)\b
How it is fixed
Fix method: Guidance or infrastructure patch
tmsh modify net self <self-ip> allow-service none (or) tmsh modify net self <self-ip> allow-service replace-all-with { tcp:443 } tmsh save sys config # CIS guidance: 1-Log in to the Configuration utility. 2-Go to Network > Self IPs. 3-Select the relevant self IP address. 4-If the specified interface does not need to listen to incoming connections ( Example BGP ,BDF ..etc) , set "Port Lockdown" to "Allow None" 5-If the specified interface need to listen for incoming connections , set "Port Lockdown" to "Allow Custom". Then in the "Custom List" add needed ports only.
Properties
- Operating systems
- Any
- Tags
- f5-bigipmanagement
- Reference
- CIS F5 Networks Benchmark v1.0.0 - 5.3 Ensure port lockdown for self IP is set
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
tmaegis scan --target f5-bigip