Re: Does IP have DNS or not?

On Wed, 7 Jul 2004, Jim Wright wrote:

> This came in a few days ago, and so I contacted the postmaster there
> regarding his system having a problem:
>
> Jul=A0 1 21:19:02 localhost postfix/smtpd[509]: connect from
> unknown[63.82.232.8]
> Jul=A0 1 21:19:04 localhost postfix/smtpd[509]: NOQUEUE: reject: RCPT
> from unknown[63.82.232.8]: 550 Client host rejected: cannot find your
> hostname, [63.82.232.8]; from=3D<***@hometel.com>
> to=3D<***wrightthisway.com> proto=3DSMTP helo=3D<mail.hometel.com>
> Jul=A0 1 21:19:04 localhost postfix/smtpd[509]: disconnect from
> unknown[63.82.232.8]
>
> He has responded back saying his info resolves fine, claiming the issue
> is on my end. I tried resolving that IP both on my home system and
> work system (different ISP/DNS servers), and both came back as:
>
> ** server can't find 8.232.82.63.in-addr.arpa: NXDOMAIN
>
> However, in between those two I went to remote.12dt.com/rns/ to do a
> reverse lookup on that address, and it responded with ns2.hometel.com
> for that IP.
>
> So, I'm assuming that he still has some DNS issues on his end, but I
> don't know enough about such things to tell him what the problem is.
> Or is there really a problem on my end somehow?

It looks like there is no PTR for 63.82.232.8:

The Authoratative servers are:

NameServer: AUTH03.NS.UU.NET
NameServer: AUTH00.NS.UU.NET

AUTH00.NS.UU.NET returns an NS delagation -- but no PTR:

;8.232.82.63.in-addr.arpa. IN PTR

;; AUTHORITY SECTION:
232.82.63.in-addr.arpa. 21600 IN NS ns1.hometel.com.
232.82.63.in-addr.arpa. 21600 IN NS ns2.hometel.com.

AUTH03.NS.UU.NET returns no delagation:

;; QUESTION SECTION:
;8.232.82.63.in-addr.arpa. IN PTR

;; AUTHORITY SECTION:
232.82.63.in-addr.arpa. 21600 IN SOA auth03.ns.uu.net.

Thus, it appears to be a sync problem between the UUnet servers. . . You
need to contact the UUnet hostmasters and have them re-initiate a zone
transfer...

--sjk