Reverse Lookups with Forwarders

[sumsum 2000]

Thanks for the info


On Tue, Jul 9, 2013 at 1:03 PM, Matus UHLAR - fantomas <uhlar at fantomas.sk>wrote:

> On 09.07.13 11:51, sumsum 2000 wrote:
>
>> I have a reverse lookup zone file configuration as follows:
>> zone "0/24.110.252.173.in-addr.**arpa" {
>>
> [...]
>
>  When I do dig -x 172.252.110.27, I expect it to forward it to
>> 10.10.96.1, but instead, it uses the default resolver.
>>
> [...]
>
>  So if DNS Server X is configured against this zone
>> , then any reverse DNS request for 173.252.110.0-173.252.110.255
>> should be forwarded via DNS Server X
>>
>
>  Currently this is not the case. There is no forwarding in the above
>> scenario ( where CIDR notation x.x.x.x/Mask is used)
>>
>
> Neither the BIND nor DNS does use the CIDR format.
> the resursive resolution searches for 27.110.252.173.in-addr.arpa which
> does
> NOT belong into 0/24.110.252.173.in-addr.arpa, they are two separate names.
>
> You would have to set up either zone 27.110.252.173.in-addr.arpa or
> 110.252.173.in-addr.arpa.
>
>> Only when the zone file is changed to
>>                        zone "110.252.173.in-addr.arpa" IN {
>>
>> All the requests for
>>
>> 173.252.110.0-173.252.110.255  is forwarded to 10.10.96.1.
>>
>
> Use 110.252.173.in-addr.arpa then. You should be aware that the IP range
> belongs to facebook, as already noted.
>
> --
> Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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