topic Reverse dns issue in Operating System - Linux

Reverse dns issue

George_Dodds — Fri, 12 May 2006 10:51:26 GMT

Hi i've got a problem with reverse dns entry.

I've added the entry in the zone file in /var/named/reverse/

It resolves fine on the internal network but doesnt resolve on the internet.

Any ideas?

ta

George

Re: Reverse dns issue

Alexander Chuzhoy — Fri, 12 May 2006 10:57:16 GMT

Are you sure that the DNS servers on the internet read your zone?
I suggest you to consult your ISP.
Even if they do it takes some time until they're synchronized.

Re: Reverse dns issue

Ivan Ferreira — Fri, 12 May 2006 10:58:32 GMT

You must ask to your DNS registration organization that you want to configure reverse lookups. They must enable the forwarding of reverse lookups to your server. When somebody from Internet tries to resolve your reverse zone, The flow will be for example:

root domains (. Authoritative DNS SERVER)
com (. Authoritative DNS SERVER)
example (example domain Authoritative DNS SERVER - The organization that sold you your domain name, here they mus add an entry to forward addr.arpa request to your server)

Re: Reverse dns issue

Vitaly Karasik_1 — Sat, 13 May 2006 14:01:11 GMT

Dear All,

there is no connection between forward and reverse zones. Only if you're owner of your IP (i.e. if you bought some IP range), your DNS servers are authorite for reverse zone.
With

whois x.y.z.a

you can check who is owner of certain IP.
And with

host -t ns z.y.x.in-addr.arpa

(or host -t ns y.x.in-addr.arpa )

you'll see NS for your reverse zone.

In most cases you're owner of yourdomain.com domain, but your ISP or your hosting company is owner of your servers IP. In this case you should ask them to add appropriate records to reverse zone.

Rgds,
Vitaly