You'll need a current license to upgrade the signatures (but not the OS, which comes with signatures).
The minimum required version for upgrading to 6.0 is 5.1. The minimum required version for upgrading to 5.1 is 5.0 The upgrades from Cisco 5.1 to 6.0 and Cisco 5.0 to 5.1 are available as a download from Cisco.com.
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...