Verified.
Version Tested: Satellite-6.3 Snap 12
Host form doesn't allow saving host with neither a blank name nor a name containing '/'. The name field is marked as "is invalid" in such cases.
Comment 3Satellite Program
2018-02-21 16:51:07 UTC
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA.
>
> For information on the advisory, and where to find the updated files, follow the link below.
>
> If the solution does not work for you, open a new bug report.
>
> https://access.redhat.com/errata/RHSA-2018:0336