[Samba] Block samba hosts by domain

[Rowland Penny]

On Thu, 10 Nov 2016 12:37:57 -0800
Linda W via samba <samba at lists.samba.org> wrote:

> Erick Ocrospoma via samba wrote:
> > On 10 November 2016 at 07:51, Vinicius Bones Silva via samba <
> > samba at lists.samba.org> wrote:
> >
> >   
> >> PROBABLY its a problem with your reverse dns resolution.
> >>     
> > ​Hi,
> >
> > DNS resolution seems to work fine.​
> >   
> ----
>     Vinicius didn't ask about DNS resolution, exactly,  but
> *reverse* DNS resolution -- i.e. looking up a name from an address.
> 
>     At best, nslookup is the wrong tool:
> > [root at server0 ~]# nslookup 172.25.0.100
> > Server:         172.25.0.254
> > Address:        172.25.0.254#53
> >   
> ---
>     as the above shows: not only does nslookup on the ip not
> return the name, but it returns the IP for a different machine!
> 

well, yes it does return the IP of a different machine, it first
returns the ip address of the server returning the result.

if you continue reading the result, you will see this: 
Address: 172.25.0.100 

and the reverse lookup returns:

name = desktop.example.com.

So the DNS is working.

I have never tried to do this, but might this way work ? :

hosts allow = 172.25.0. %M.example.com

Rowland