[Pdns-users] forward /28 subnet form inside of a /24 reverse zone

[Imre Gergely]

You don't have to, just the ones that you want to delegate to
ns1,2.otherserver.com.

On 03/26/2010 11:42 AM, Athiqur Rahman wrote:
> Since i want the 224/28 subnet to be forwarded to another name server
> and the rest of the ip address in the /24 to be answered by my own name
> server could i do something like this?
> 
> 79.73.217.in-addr.arpa:
> 
>    IN   NS    ns1.myserver.com  // this is the NS for all the IP in that
> range that my name server will answer
>    IN   NS    ns2.myserver.com
> 
> 224/28    IN    NS    ns1.otherserver.com. // this /28 subnet will not
> be answered by my name server but another server
> 224/28    IN    NS    ns1.otherserver.com.
> 
> Or do i have to define every other ip as part of a subnet which is
> smaller then /24?
> 
> 
> Imre Gergely wrote:
>>
>> The rest of the IP addresses (outside that /28) you can define with
>> PTR in the normal way, whenever you like. It's not necessary to define
>> them all, if they don't have a PTR record, that's alright.
>>
>> So in your zone file on your 2 namservers you'll have
>>
>> 224/28    IN    NS    ns1.otherserver.com.
>> 224/28    IN    NS    ns1.otherserver.com.
>>
>> 26    IN    PTR    foo1.example.com.
>> 27    IN    PTR    foo2.example.com.
>> 28    IN    CNAME    28.224/28.79.73.217.in-addr.arpa.
>> 29    IN    CNAME    29.224/28.79.73.217.in-addr.arpa.
>> [..]
>> 43    IN    CNAME    43.224/28.79.73.217.in-addr.arpa.
>> 44    IN    PTR    foo3.example.com.
>>
>> You only have to have the CNAMEs for _all_ the IP addresses in that
>> /28 subnet, because you want to delegate them all to the other
>> nameserver.
>>
>> On 03/25/2010 06:50 PM, Athiqur Rahman wrote:
>>> Looking at the link below. It looks like that I will have to create
>>> CNAME entry for every IP in the /28 subnet, That is 16 CNAME entries?
>>> The nameserver that I am sending to will have to create a zone record
>>> called 224/28.79.73.217.in-addr.arpa?
>>>
>>> I am thinking do I have to define the rest of the IP addreses or will
>>> just simple defining that one /28 be enough? Will the rest of the IP
>>> addresses fall into the umbrella of the main NS definition in the zone
>>> record?
>>>
>>> Imre Gergely wrote:
>>>>
>>>> You mean delegating a subnet to another nameserver? This may help:
>>>>
>>>> http://www.zytrax.com/books/dns/ch3/#reverse
>>>>
>>>> On 03/25/2010 05:53 PM, Athiqur Rahman wrote:
>>>>> Hi,
>>>>>
>>>>> I have the following zone 79.73.217.in-addr.arpa with the NS set as
>>>>> my 2
>>>>> name servers.
>>>>>
>>>>> What i want to do is just forward reverse dns requests for
>>>>> 217.73.79.224/28 to another name server. What would be the best way to
>>>>> go about this?
>>>>>
>>>>> Thanks
>>>>> _______________________________________________
>>>>> Pdns-users mailing list
>>>>> Pdns-users at mailman.powerdns.com
>>>>> http://mailman.powerdns.com/mailman/listinfo/pdns-users
>>>>>
>>>>
>>>
>>>
>>
> 
> 

-- 
Imre Gergely
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