FW.5 Remove or Disable Unused Rules
Remove or disable permissive firewall rules promptly when no longer required to limit attack surface.
2
artefacts
1
held by a system
1
at each review
easy
to go live
SIEM / log platform
where the evidence lives
teal = a system already holds it · olive = produced at each review
system holds itEvidence a system already holds
- Disabled/removed rule log · SIEM / log platform
periodic reviewEvidence produced at each review
- Periodic firewall rule review records · Cloud console / configuration management
governing documentDocuments that govern the control
none for this control
First move
Automate the pull from your SIEM / log platform. Retention and alert rules exported from the SIEM; review evidence is the closed-alert record with reviewer and time.
Common gaps auditors find
- no scheduled rule review
- stale rules accumulate
Do this for your whole sheet
Paste the rows you run your controls from and get this mapping for every control at once, with the periodic-review ones flagged and a first move per row. No account for the first run.
Build my evidence sheetFW.4 Approve and Document Inbound Rules · FW.6 Host-Based Firewall for Remote Workers