So if i m not wrong you have your dns server outside. I can see an acces-list applied on the outside permitting only icmp. Permit the dns replies and see you are able to ping. Add the following access-list :
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...