The Affair Accompaniment Table
CBAC maintains a affair accompaniment table with affiliation information, such as the source/destination IP addresses,
source/destination anchorage numbers, and the appliance agreement information. For every admission packet that CBAC
inspects, the accompaniment table is adapted with all the information. This advice is acclimated to bite a activating aperture in
the firewall admission account for the acknowledgment traffic. Acknowledgment cartage will be acceptable aback through the firewall alone if an
entry in the accompaniment table indicates that the packet belongs to a permissible session. Example 5-1 shows sample
session accompaniment table information, and Example 5-2 shows the activating ACL access that corresponds to the
information in this accompaniment table.
Example 5-1. Affiliation Advice in the Accompaniment Table
Router# appearance ip audit session
Established Sessions
Session 25A4E53 (10.1.1.1:11006)=>(20.1.1.1:23) tcp SIS_OPEN