Only two. If you need more concurrent AnyConnect-Users, you need an AnyConnect Premium or AnyConnect Essentials license. The Essentials-License is much cheaper, but doesn't allow clientless VPNs or other advanced VPN-features.
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...