Firewall policy review
Do not use for IPS signature tuning or endpoint EDR. Not for SASE SWG categories.
Procedure
- Export the rulebase. Hit-count sort. Unused 90-day rules are candidates, not automatic deletes.
- Flag any-any, any-app, and service-any above a named rule. Shadow detection before inserts.
- Require log-end and a named owner tag on every allow.
- App-ID / application overrides: document the exception and an expiry.
- Verify with a packet that should hit the new rule and a packet that must still hit the old one.
rule 142 src any dst any app any action allow SHADOWED by 87
rule 210 src 10.8.0.0/16 dst payments app ssl action allow no-log
Anti-patterns
- Never insert at the top "just to test".
- Do not disable a rule without a hit-count export attached to the ticket.
Safety
Reviews are read-only. Commits are change-guarded and twin-tested on a lab vsys where possible.