The MARS has a built-in NESSUS but it can't be used to do manual scans. And since Nessus has recently changed their licensing scheme (got more commercial) it will be pretty difficult for Cisco to even provide this feature in the future. Have a look at this post:
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...