Broad prefilter Fastpath rule
At a glance
Base severity
Area
Platform
Evidence level
Benchmark reference
Reads the export, not the device
ConfigProof reads a configuration export. This control is evaluated against the objects in that file, and it reports what the file says. It does not connect to the device and sees no traffic, so a finding here describes the configuration, not what the firewall is doing right now.
Why it matters
Fastpath skips Security Intelligence, the access control policy and Snort entirely. A broad Fastpath rule means uninspected traffic.
How to fix it
Web interface
The steps below are written for the web interface. A finding raised on your own export carries the same steps with your object names filled in.
- In FMC (or cdFMC): Policies > Access Control > Prefilter > edit the policy > restrict the rule's networks and interfaces, or change Action to Analyze. Save, Deploy.
Command line
This analyzer version writes no command text for this control. The steps above are the remediation it offers.
How to confirm the fix
- On the FTD CLI (read only): show running-config access-list CSM_FW_ACL_ | include PREFILTER, and confirm the trust line is narrowed.
Limits
- No limitation is recorded for this control beyond the one that applies to all of them: it reads a configuration export.
Compliance references
No benchmark recommendation is mapped to this control in this version.
More in Security Policies
- FTD-SEC-005Broad Trust rule bypasses inspection
- FTD-SEC-007Rule does not log
- FTD-SEC-008Disabled rule left in the policy
- FTD-SEC-009Rule with zero hits in the collected counter
- FTD-SEC-010Rule covered by an earlier rule
- FTD-SEC-011Cleartext or legacy service allowed
- FTD-SEC-012Remote administration port open from the internet side
- FTD-SEC-020Allow rule without a zone
See it on your own firewall
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