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First, some background info:
reverse dns
From: Steve Nowacki
Date: Tuesday, July 29, 2003
Time: 10:02:19 am
My company (knightprinting.com) operates its own name servers:
ns1.arvidburns.com, and ns2.arvidburns.com. We have ns1 on our T1
(AT&T) connection, and ns2 on our DSL (Qwest) connection. Mail comes in
on the dsl, ftp on the T1.
If you are familiar with qwest.net, they have an account tools area on
their web site where you can configure reverse dns if you do not use
qwest name servers, and forward dns if you do use qwest name servers.
Until recently, nothing had been configured here. Also, until recently,
I had no reverse zones set up in QuickDNS. As far as I know, AT&T
doesn't have a similar tools area.
We had a problem of mail being rejected due to no reverse dns for our
domain. First, I set up reverse zones in qdns using the assistant. Now,
the mail that was being rejected went through, but nslookup and
iNetTools (Wild Packets OS 9) still returned a non-existent domain
message for our mail server's IP unless our name servers were directly
called upon for the info. Only after configuring reverse dns at the
qwest site did nslookup and iNetTools return the correct info
regardless of the name server being called upon. Having or not having a
reverse zone set up in qdns doesn't affect the result of nslookup for
the mail server's IP as long as the reverse info is configured at the
qwest site. Which is, I am guessing, qwest's way of delegating control
for reverse dns to me.
AT&T support told me that since they don't handle our forward dns, they
don't have anything to do with our reverse dns and therefore don't have
to "delegate" any power to us. With a reverse zone set up in qdns for
our ftp server, I get the same "non-existent domain" message for that
server's IP from nslookup unless I directly call upon our name servers
for the info.
If AT&T doesn't have to change or allow anything on their end for me to
set up reverse dns, and a reverse zone in qdns doesn't change the
lookup result, unless I call on one of my name servers directly, what
do I need to do to make this work correctly?
Steve
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