How to Fix Reverse DNS?

Marc Haber mh+bind-users at zugschlus.de
Wed Sep 23 06:15:40 UTC 2015


On Tue, Sep 22, 2015 at 04:54:45PM -0500, Ron Wingfield wrote:
>  I have recently converted from a "legacy" DSL service to AT&T's
>  U-verse . . .has been a painful experience. Heretofore, the following
>  from /var/named/named.conf
> 
>      zone "233.202.162.in-addr.arpa" {
>              type master;
>              file "./zonefiles/db.233.202.162.rev";
>      };
> 
> 
>  . . .and the contents of the zone configuration file as follows:
> 
>      $TTL 3h
> 
>      @ IN      SOA  archaxis.net.   root.archaxis.net. (
>      2015080601    ; Serial
>      3h      ; Refresh
>      1h      ; Retry
>      1w      ; Expire
>      1h )    ; Negative cashing TTL
> 
>              IN NS   ns1.archaxis.net.
>              IN NS   ns2.archaxis.net.
> 
>      1       IN PTR archaxis.net.
>      1       IN PTR ns1.archaxis.net.
>      1       IN PTR ns2.archaxis.net.

Your provider has used a RFC2317 scheme to delegate the reverse DNS to
you:

81.233.202.162.in-addr.arpa. 7200 IN    CNAME 81.80/29.233.202.162.in-addr.arpa.
80/29.233.202.162.in-addr.arpa. 7200 IN NS      ns2.archaxis.net.
80/29.233.202.162.in-addr.arpa. 7200 IN NS      ns1.archaxis.net.

so you need

zone "80/29.233.202.162.in-addr.arpa." {
 ...
}

Btw, this diagnosis would not have been possible if you had obfuscated
the IP address. Thanks for being open, showing your real data,
allowing swift and easy help.

Greetings
Marc


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