Older sensor versions will require you to setup keys for your ntp server. You would need to work with your network administrator that setup the ntp server to see if keys have already been created that you can use, or if new keys would need to be created.
NEWER sensor versions, however, provide a new configuration option:
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...