"Empty zones" and BIND 9.4
Adam Tkac
atkac at redhat.com
Tue Jun 19 08:37:11 UTC 2007
Mark Andrews napsal(a):
>> For the loopback subnet reverse zone, if you want to create a PTR
>> record for each possible IP, use a wildcard. So instead of this from
>> Mark's example:
>>
>> 1.0.0 PTR localhost.
>>
>> use this:
>>
>> * PTR localhost.
>>
>> Chris Buxton
>> Men & Mice
>>
>
> Normally you only need "1.0.0 PTR localhost." as that
> is usually the only address in use.
>
> If you don't use it then you don't need a PTR. If you do
> use it but forget the PTR then you want to stop the query
> leaking so that why the zone is 127.IN-ADDR.ARPA and not
> 1.0.0.127.IN-ADDR.ARPA, 0.0.127.IN-ADDR.ARPA or 0.127.IN-ADDR.ARPA.
> NXDOMAIN will be returned if there is no PTR record.
>
> Additionally the PTR from the wildcard will be rejected by
> may applications / libraries as there is not a corresponding
> A record.
>
> I DO NOT recommend adding all the possible A records in this
> space. It will only cause applications to break.
>
> Mark
>
Yes, I also think loopback could be only 127.0.0.1 . But when rfc 3330
says 127/8 could be loopback I've asked if anyone know nice solution for
this problem :)
Adam
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