If the user is an L2TP client that uses Microsoft CHAP version 1 or version 2, and the security appliance is configured - to authenticate against the local database, you must include the mschap keyword. For example, username password mschap.
Note tunnel-group must be the DefaultRAGroup name.
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...