Assistance with reverse lookup zone

Mark Andrews marka at isc.org
Fri Jun 12 01:42:16 UTC 2009


In message <B86F8BCEEED5184CA225E0CC10FF61163EC03A at bdc03srv04.bdc.int>, "Frank 
Pikelner" writes:
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> 
> 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):

	ns1.blue-dot.ca is NOT configured to serve
	162-27.3.187.64.in-addr.arpa.  It should be so configured.

	Mark

162-27.3.187.64.in-addr.arpa. 86400 IN  NS      ns3.blue-dot.ca.
162-27.3.187.64.in-addr.arpa. 86400 IN  NS      ns1.blue-dot.ca.
162-27.3.187.64.in-addr.arpa. 86400 IN  NS      ns2.blue-dot.ca.
;; Received 115 bytes from 209.135.99.3#53(ns2.toroon.grouptelecom.net) in 249 ms

3.187.64.in-addr.arpa.  1800    IN      SOA     ns1.blue-dot.ca. dnsadmin.ns1.blue-dot.ca. 2009011401 1800 900 604800 1800
;; Received 110 bytes from 64.187.3.170#53(ns3.blue-dot.ca) in 679 ms

> 
> $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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> <HTML>
> <HEAD>
> <META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
> charset=3Diso-8859-1">
> <META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version =
> 6.5.7651.59">
> <TITLE>Assistance with reverse lookup zone</TITLE>
> </HEAD>
> <BODY>
> <!-- Converted from text/plain format -->
> <BR>
> 
> <P><FONT SIZE=3D2>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.<BR>
> <BR>
> <BR>
> <first_last at some_domain.com>: host =
> mx.some_domain.com[xxx.xx.xx.xx] said: 450 4.7.1 Client<BR>
>     host rejected: cannot find your hostname, =
> [64.187.3.170] (in reply to RCPT<BR>
>     TO command)<BR>
> <BR>
> <BR>
> 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):<BR>
> <BR>
> $ORIGIN .<BR>
> $TTL 86400      ; 1 day<BR>
> 3.187.64.in-addr.arpa   IN SOA  ns1.blue-dot.ca. =
> dnsadmin.ns1.blue-dot.ca. (<BR>
>             &=
> nbsp;           &n=
> bsp;       2009011401 ; serial<BR>
>             &=
> nbsp;           &n=
> bsp;       =
> 1800       ; refresh (30 minutes)<BR>
>             &=
> nbsp;           &n=
> bsp;       =
> 900        ; retry (15 minutes)<BR>
>             &=
> nbsp;           &n=
> bsp;       604800     =
> ; expire (1 week)<BR>
>             &=
> nbsp;           &n=
> bsp;       =
> 1800       ; minimum (30 minutes)<BR>
>             &=
> nbsp;           &n=
> bsp;       )<BR>
>             &=
> nbsp;           =
> NS      ns1.blue-dot.ca.<BR>
>             &=
> nbsp;           =
> NS      ns2.blue-dot.ca.<BR>
>             &=
> nbsp;           =
> NS      ns3.blue-dot.ca.<BR>
> $ORIGIN 3.187.64.in-addr.arpa.<BR>
> 170           &nbs=
> p;         =
> PTR     smtp3.netcraftcommunications.com.<BR>
> </FONT>
> </P>
> 
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> </HTML>
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> https://lists.isc.org/mailman/listinfo/bind-users
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-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org



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