For example, to enable authentication for TCP connections originated from the inside interface to the outside network: aaa authentication include tcp/0 inside 192.168.1.0 255.255.255.0 184.108.40.206 255.255.255.224 tacacs+
Most likely you will get in the logs this information if you have enabled authentication through the ASA or Firewall. Can you post the logs to see if there are critical or just informational logs and what exactly do they mean?
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...