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Date:      Fri, 04 Apr 2008 16:59:01 -0400
From:      Jon Radel <jon@radel.com>
To:        John Almberg <jalmberg@identry.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Tinydns configuration... works, but no reverse dns
Message-ID:  <47F69695.8010606@radel.com>
In-Reply-To: <3D3F9F03-11A2-46CB-9E1D-B469181B024A@identry.com>
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[-- Attachment #1 --]
John Almberg wrote:
> 
> I am using tinydns on my FreeBSD server. Normal DNS lookups work fine,
> but I can't get reverse DNS to work.
> 
> My colocation provider says they have delegated DNS to my name servers.
> If there is a way to independently verify this, I don't know how to do
> it, so I am taking their word for it.

I'm a bind guy myself, so I can't answer to your tinydns configuration,
but as to how to independently verify delegation, I find the following
handy:

freesparky# dig +trace -x 66.111.0.194

; <<>> DiG 9.4.2 <<>> +trace -x 66.111.0.194
;; global options:  printcmd
.                       112878  IN      NS      A.ROOT-SERVERS.NET.
.                       112878  IN      NS      B.ROOT-SERVERS.NET.
.                       112878  IN      NS      C.ROOT-SERVERS.NET.
.                       112878  IN      NS      D.ROOT-SERVERS.NET.
.                       112878  IN      NS      E.ROOT-SERVERS.NET.
.                       112878  IN      NS      F.ROOT-SERVERS.NET.
.                       112878  IN      NS      G.ROOT-SERVERS.NET.
.                       112878  IN      NS      H.ROOT-SERVERS.NET.
.                       112878  IN      NS      I.ROOT-SERVERS.NET.
.                       112878  IN      NS      J.ROOT-SERVERS.NET.
.                       112878  IN      NS      K.ROOT-SERVERS.NET.
.                       112878  IN      NS      L.ROOT-SERVERS.NET.
.                       112878  IN      NS      M.ROOT-SERVERS.NET.
;; Received 272 bytes from 216.143.151.3#53(216.143.151.3) in 13 ms

66.in-addr.arpa.        86400   IN      NS      indigo.ARIN.NET.
66.in-addr.arpa.        86400   IN      NS      BASIL.ARIN.NET.
66.in-addr.arpa.        86400   IN      NS      henna.ARIN.NET.
66.in-addr.arpa.        86400   IN      NS      dill.ARIN.NET.
66.in-addr.arpa.        86400   IN      NS      figwort.ARIN.NET.
66.in-addr.arpa.        86400   IN      NS      chia.ARIN.NET.
66.in-addr.arpa.        86400   IN      NS      epazote.ARIN.NET.
;; Received 194 bytes from 2001:dc3::35#53(M.ROOT-SERVERS.NET) in 107 ms

0.111.66.in-addr.arpa.  86400   IN      NS      auth1.ns.nyi.net.
0.111.66.in-addr.arpa.  86400   IN      NS      auth2.ns.nyi.net.
;; Received 93 bytes from 192.42.93.32#53(figwort.ARIN.NET) in 94 ms

194.0.111.66.in-addr.arpa. 86400 IN     NS      ns1.identry.com.
194.0.111.66.in-addr.arpa. 86400 IN     NS      ns2.identry.com.
194.0.111.66.in-addr.arpa. 86400 IN     NS      ns3.identry.com.
;; Received 140 bytes from 64.90.175.14#53(auth1.ns.nyi.net) in 16 ms

dig: couldn't get address for 'ns3.identry.com': not found



which does bring up the issue of why you refer to ns0 and ns1 in your
question and your provider delegates to ns1, ns2, and ns3, the last of
which doesn't appear to have an A record anywhere useful.

A retry, using a different NS record this time:

.....trimmed....
194.0.111.66.in-addr.arpa. 86400 IN     NS      ns1.identry.com.
194.0.111.66.in-addr.arpa. 86400 IN     NS      ns2.identry.com.
194.0.111.66.in-addr.arpa. 86400 IN     NS      ns3.identry.com.
;; Received 140 bytes from 64.90.175.14#53(auth1.ns.nyi.net) in 23 ms

194.0.111.66.in-addr.arpa. 3600 IN      PTR     on.identry.com.
0.111.66.in-addr.arpa.  259200  IN      NS      ns0.0.111.66.in-addr.arpa.
0.111.66.in-addr.arpa.  259200  IN      NS      ns1.0.111.66.in-addr.arpa.
;; Received 107 bytes from 66.111.0.253#53(ns1.identry.com) in 17 ms

The PTR record looks reasonable, but those NS records...well.  ;-)

--Jon Radel

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