IPv6 reverse

William F. Maton Sotomayor wmaton at ryouko.imsb.nrc.ca
Sat Dec 26 16:08:08 UTC 2009


On Sat, 26 Dec 2009, Julien ÉLIE wrote:

> I do not manage to reverse IPv6 addresses.  For instance:
> nnrpd[17962]: ? reverse lookup for 2001:41d0:1:6d44::1 failed: reverse lookup 
> validation failed -- using IP address for access

quetzal 329# dig soa 0.d.1.4.1.0.0.2.ip6.arpa

;

;; ANSWER SECTION:
0.d.1.4.1.0.0.2.ip6.arpa. 86400 IN      SOA     dns15.ovh.net. 
tech.ovh.net. 2009122601 43200 4320 2419200 86400

;; AUTHORITY SECTION:
0.d.1.4.1.0.0.2.ip6.arpa. 86400 IN      NS      ns15.ovh.net.
0.d.1.4.1.0.0.2.ip6.arpa. 86400 IN      NS      dns15.ovh.net.

OK, ovh.net 'owns' the reverse for that.....

> Yet, it seems to be properly defined:
>
> % host 2001:41d0:1:6d44::1
> 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.4.d.6.1.0.0.0.0.d.1.4.1.0.0.2.ip6.arpa 
> domain name pointer news.trigofacile.com.

Perhaps locally yes....but I see reverse delegation for the subnet doesn't 
go further?

quetzal 334# dig 
1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.4.d.6.1.0.0.0.0.d.1.4.1.0.0.2.ip6.arpa.

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37285
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.4.d.6.1.0.0.0.0.d.1.4.1.0.0.2.ip6.arpa. 
IN A

;; AUTHORITY SECTION:
0.d.1.4.1.0.0.2.ip6.arpa. 10797 IN      SOA     dns15.ovh.net. 
tech.ovh.net. 2009122601 43200 4320 2419200 86400

It's not resolving.  Maybe the admins at ovh.net can put that there for 
you?

> % host news.trigofacile.com
> news.trigofacile.com has address 91.121.26.68
> news.trigofacile.com has IPv6 address 2001:41d0:1:6d44::1

quetzal 336# dig any +short news.trigofacile.com
2001:41d0:1:6d44::1
91.121.26.68

Yup, I agree that looks good.

> Maybe I have an issue with my system configuration?  (Debian Etch)

DNS issue most likely...

wfms


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