Not completely sure what you are asking - but if you're asking why you don't see any entries added by CBAC into the inbound access-list (to allow the returning traffic), when you 'sh access-list' - then you might want to have a read of this:
As of 12.3T - CBAC bypasses the processing of the inbound access-list for traffic which is permitted by CBAC - to speed up the packet processing - so you won't see entries dynamically added to the access-lists - you have to look in 'sh ip inspect sessions' instead.
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...