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Cisco Bug: CSCte78548 - ZBF: class-map ACL matches on post-NAT IP for outbound traffic in 22T

Last Modified

Feb 08, 2017

Products (1)

  • Cisco IOS

Known Affected Releases

12.4(22)T

Description (partial)

Symptom:

Zone-based firewall uses ACLs in class-maps to match traffic that is subject to stateful inspection. In the IOS 12.4(22)T it is necessary to use post-NAT IP addresses in ACLs to match outbound (inside to outside) traffic. This is not a correct behavior as it doesn't allow to create different firewall policies for different inside hosts in case of PAT.

Conditions:

This happens in IOS 12.4(22)T only. IOS 12.4(20)T and IOS 12.4(24)T matches on pre-NAT (private IP address) for outbound traffic.
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