[c-nsp] Cisco CBAC one stateful rule on an interface bypasses rules on other interfaces

Lukasz Bromirski lukasz at bromirski.net
Thu Dec 11 14:24:51 EST 2025


Marco,

First of all, you should move to ZBFW from CBAC, CBAC is deprecated.

Yes, that's expected behavior, CBAC inspect rule opens up channels in
any of the other interfaces if the session is allowed to be established.

You have to check ingress traffic using ACL *before* it creates state
via inspect engine to stop it from allowing traffic to go through.

-- 
Ɓukasz Bromirski
CCIE R&S/SP #15929, CCDE #2012::17, PGP Key ID: 0xFD077F6A


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