asking ipv6

[Chris Buxton]

To quickly see the name of your PTR record, use 'dig -x ip-addr',  
replacing 'ip-addr' with the address in question, then examine the  
Question section of the result. For example (continuing with Niall's  
address):

$ dig -x 2001:770:98:200::35:1

;; QUESTION SECTION:
; 
1.0.0.0.5.3.0.0.0.0.0.0.0.0.0.0.0.0.2.0.8.9.0.0.0.7.7.0.1.0.0.2 
.ip6.arpa. IN PTR

The next question, of course, is regarding the name of the zone that  
would contain such a PTR record. Make sure that you check the  
delegation to see what's given to you, and then create that zone. For  
example:

$ dig -x 2001:770:98:200::35:1 +trace

The last section before the "answer" shows the delegation (or would,  
if there wasn't a DNAME record involved...):

0.7.7.0.1.0.0.2.ip6.arpa. 172800 IN	NS	ns2.kerna.ie.
0.7.7.0.1.0.0.2.ip6.arpa. 172800 IN	NS	ns.ripe.net.
0.7.7.0.1.0.0.2.ip6.arpa. 172800 IN	NS	ns.heanet.ie.
;; Received 165 bytes from 202.12.28.140#53(sec3.apnic.net) in 287 ms

In this case, actually, a further domain name is then DNAME'd to  
something directly under Niall's control, as he indicated:

8.9.0.0.0.7.7.0.1.0.0.2.ip6.arpa. 86400	IN DNAME  
8.9.0.0.0.7.7.0.1.0.0.2.ip6.ucd.ie.

If they had simply delegated that name, instead of DNAME'ing it, he  
would have created zone named "8.9.0.0.0.7.7.0.1.0.0.2.ip6.arpa.".

In your case, if you don't see your name servers anywhere in the  
"+trace" output, then there's nothing delegated to you (yet). In which  
case, talk to whoever assigned the IPv6 subnet to you about getting  
control of your own reverse zone.

Chris Buxton
Professional Services
Men & Mice
Address: Noatun 17, IS-105, Reykjavik, Iceland
Phone:   +354 412 1500
Email:   cbuxton at menandmice.com
www.menandmice.com

Men & Mice
We bring control and flexibility to network management

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On Feb 6, 2008, at 8:02 AM, Niall O'Reilly wrote:

> On 6 Feb 2008, at 15:32, Rito wrote:
>
>> anyway could you show me how to add it? is it like we add ptr in  
>> ipv4?
>
> 	Nearly.
> 	It goes under ip6.arpa, and is much longer, of course.
> 	Don't forget to fill zeroes where needed!
>
> 	Here's an example.
> 	We alias everything below 8.9.0.0.0.7.7.0.1.0.0.2.ip6.arpa
> 	into a local zone; you don't need to do that.
>
> seahan(noreilly)22: dig +short aaaa auth-ns1.ucd.ie
> 2001:770:98:200::35:1
> seahan(noreilly)23: dig +short ptr
> 1.0.0.0.5.3.0.0.0.0.2.2.8.9.0.0.0.7.7.0.1.0.0.2.ip6.arpa
> 8.9.0.0.0.7.7.0.1.0.0.2.ip6.ucd.ie.
> 1.0.0.0.5.3.0.0.0.0.2.2.8.9.0.0.0.7.7.0.1.0.0.2.ip6.ucd.ie.
> seahan(noreilly)24:
>
>
> 	Best regards,
>
> 	Niall O'Reilly
> 	University College Dublin IT Services
>
> 	PGP key ID: AE995ED9 (see www.pgp.net)
> 	Fingerprint: 23DC C6DE 8874 2432 2BE0 3905 7987 E48D AE99 5ED9
>
>
>
>
>
>