It may be related to this bug, the fix seems to be upgrading to version 6.0(0.77). If anybody else has experienced this and confirm this is what they had to do to resolve the issue I'd appreciate hearing about it.
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
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...