It turns out this was an issue between the wireless router and the VPN software. I found a tech note after a few hours of searching that described the issue to a T. Linksys wireless routers and Cisco VPN clients apparently dont get along very well. You would think since Cisco makes them both it would work as intended.
I had a problem also and had to open up ports 1723 and 500 on my Linksys router. Is this the same problem you had? Even though the router config was checked to permit IPSec traffic it still did not work until I did this.
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...