The 800 series is a very large family with many different feature sets. IPSec VPNs with dynamic IPv4 addresses are possible, but it depends on what specific model you have, software version and feature set and whether you have dynamic addresses at one end of the connection or both. Let's start with figuring out what specific models these are. Can you post the output from a "show version" command run from these devices?
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
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...