FireMon in a 100+ firewall environment.
Use Cases and Deployment Scope
We use FireMon to track changes in traffic, find rules that we can clean up and restrict, and report to higher-ups. I personally use it to export lists of potential rules to change based on control failures. We use it in most of our separate business units for a variety of reasons, but most are using it to improve security posture.
Pros
- Regular reporting.
- Dashboarding
Cons
- When my query is too complicated, the search bar changes to an advanced mode. I'd love for it to always be capable of the beginner mode since it takes a long time to get all the pieces of the query I need in advanced mode.
- Sometimes our active VPN tunnels will show "unused" in FireMon when they are used.
- I use the allowlisting feature frequently, but it's not possible to bulk-allowlist items.
- I'd love to be able to report on new control failures. There are a lot of reporting options available, but it seems like a manual export of a CSV is my only choice if I want to look at control failures.
Return on Investment
- FireMon has made it easy to discover places where rules can be improved.
- FireMon has improved our security on existing firewalls and makes it easy to discover when new dangerous rules are implemented.




