Nat-T I have seen strange behaviour with the VPN client.When it connects from behind an ADSL Router/Firewall that supports VPN passthrough the connection doesn't always work.You have to untick enable transparent tunneling.But the next time it will work without this problem.Also some applications appeat to work better than others.
Some SOHO routers have ipsec passthrough features that can interfere with isakmp and ipsec negotiation. I prefer disabling those features, and relying on using nat traversal on the software client - it has always worked flawlessly for us
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...