some hardening tips/scripts

[nrvale0]

Hoping that someone can give some advice on a few issues with a Samba
PDC. 

First from the Samba side, is there a way to make Samba limit/deny
null sessions? I think I remember reading that null sessions are
needed to extract share information from IPC$, but is there something
similar to the RestrictAnonymous registry key for Samba other than
limiting hosts that can connect to a Samba PDC with the "hosts allow"
options.