Re: Reverse DNS problem
- From: "Kevin D. Goodknecht Sr. [MVP]" <admin@xxxxxxxxxxxxxx>
- Date: Mon, 8 May 2006 14:27:44 -0500
Kevin Agard wrote:
I'm hoping somebody can help me. We run to DNS servers on Win 2K3, no
AD.
The primary suffered a hardware failure si I reinstalled from scratch
and configured the DNS again. The problem is that reverse DNS seems to
be failing and as a result, we are having a lot of mail rejected.
Here is what I get back from DSLReports:
WARNING: Duplicate zone found (128.172.195.65.in-addr.arpa. is
repeated). This can prevent the lookup from continuing
(BIND8 and BIND9 will cause a 'server failure' response).
Although I will continue, be aware that
most DNS servers will not see your reverse DNS entry.
Which seems to be causing a loop however I can't figure out where.
Here is the reverse lookup zone file. Can anyone spot what I'm doing
wrong?
;
; Database file 172.195.65.in-addr.arpa.dns for
172.195.65.in-addr.arpa zone.
; Zone version: 117
;
@ 1800 IN SOA ns1.naemt.com.
hostmaster.naemt.org. ( 117 ;
serial number 3600 ; refresh
300 ; retry
1209600 ; expire
7200 ) ; default TTL
;
; Zone NS records
;
@ NS ns1.naemt.com.
@ NS ns2.naemt.com.
;
; Zone records
;
;
; Delegated sub-zone: 128.172.195.65.in-addr.arpa.
;
128 NS ns1.naemt.com.
; End delegation
130 PTR wildcat.naemt.org.
131 PTR alpha.naemt.org.
132 PTR kevin.agard.org.
133 1200 PTR ns1.naemt.com.
134 PTR wall2.naemt.org.
135 PTR eteam.naemt.org.
136 PTR host136.naemt.org.
137 PTR listserv.ems-l.org.
138 1200 PTR ns2.naemt.com.
139 PTR mail.naemt.net.
140 PTR brother.naemt.org.
141 PTR host141.naemt.org.
142 PTR host142.naemt.org.
You've broken your delegation by creating a delegation to itself and your
zone is named wrong.
Create a new zone named 128.172.195.65.in-addr.arpa then create your PTRs in
it. The delegated subzone is still intact at your ISP, See:
QUESTION SECTION:
130.172.195.65.in-addr.arpa. IN CNAME
ANSWER SECTION:
130.172.195.65.in-addr.arpa. 21600 IN CNAME
130.128.172.195.65.in-addr.arpa.
But it can't find the PTR because you've misnamed your zone.
--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps
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