Assistance with reverse lookup zone

[Sven Emil Skretteberg]

Hi

As others have indicated, this block has been delegated to you using RFC2317
- Classless IN-ADDR.ARPA delegation.

You have to make configure a zone in your named.conf named
162-27.3.187.64.in-addr.arpa.

Then populate this zone with your data. Something like
...
$ORIGIN 162-27.3.187.64.in-addr.arpa.
170        PTR     smtp3.netcraftcommunications.com.
...

Regards
Sven Emil Skretteberg
DNS admin, EDB Business Partner

On Thu, Jun 11, 2009 at 8:08 PM, Frank Pikelner <
Frank.Pikelner at netcraftcommunications.com> wrote:

>
> Every now and then we get a bounce on emails that are sent through one of
> our mails servers located on 64.187.3.170. The bounce messages look as
> follows and appear to indicate that our reverse zone is missing a record,
> though the record is there and resolves through nslookup. The ISP delegates
> a number of IP addresses from the zone back to us (16 IP addresses). So my
> guess is that our zone file needs to be rewritten or there may be something
> else I'm missing.
>
>
> <first_last at some_domain.com>: host mx.some_domain.com[xxx.xx.xx.xx] said:
> 450 4.7.1 Client
>     host rejected: cannot find your hostname, [64.187.3.170] (in reply to
> RCPT
>     TO command)
>
>
> Performing a manual reverse lookup correctly displays the correct name for
> 170.3.187.64.in-addr.arpa. Our zone file looks as follows (other records
> removed):
>
> $ORIGIN .
> $TTL 86400      ; 1 day
> 3.187.64.in-addr.arpa   IN SOA  ns1.blue-dot.ca. dnsadmin.ns1.blue-dot.ca.
> (
>                                 2009011401 ; serial
>                                 1800       ; refresh (30 minutes)
>                                 900        ; retry (15 minutes)
>                                 604800     ; expire (1 week)
>                                 1800       ; minimum (30 minutes)
>                                 )
>                         NS      ns1.blue-dot.ca.
>                         NS      ns2.blue-dot.ca.
>                         NS      ns3.blue-dot.ca.
> $ORIGIN 3.187.64.in-addr.arpa.
> 170                     PTR     smtp3.netcraftcommunications.com.
>
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