[Samba] Block samba hosts by domain

Linda W samba at tlinx.org
Thu Nov 10 20:37:57 UTC 2016

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
> Server:
> Address:
    as the above shows: not only does nslookup on the ip not
return the name, but it returns the IP for a different machine!

    If you have 'dig', the "-x" option should do the trick.

  dig -x

If you want to not take a cached answer (as the dig, above does),
you can specify a server or trace from the root:

  dig @dns-server1 -x IPaddr
  dig @dns-server2 -x IPaddr

or tracing:

  dig +trace -x IPaddr


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