Problem with hosting providers reverse DNS

Merton Campbell Crockett m.c.crockett at adelphia.net
Wed Aug 16 13:31:09 UTC 2006


On 15 Aug 2006, at 22:12 , Mark Andrews wrote:

>
>> In article <ebtaej$e3h$1 at sf1.isc.org>, andrewgroups at gmail.com wrote:
>>
>>> When I run a reverse DNS search on our hosting provider,  this error
>>> "WARNING: Duplicate zone found ..."  appears randomly.  Some email
>>> server are blocking us and I suspect it is because they have  
>>> something
>>> that is not well configured.  Can anyone figure out what the  
>>> problem is
>>> and why this "Duplicate zone found" error is returned?
>>
>> I'm not sure what it's talking about.
>
> 	dns-01-002.root-dns.com is lame.
>
> ; <<>> DiG 9.3.2 <<>> 56.255.133.216.in-addr.arpa ptr +norec  
> @dns-01-002.root-dns.com
> ; (1 server found)
> ;; global options:  printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10581
> ;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2
>
> ;; QUESTION SECTION:
> ;56.255.133.216.in-addr.arpa.	IN	PTR
>
> ;; AUTHORITY SECTION:
> 255.133.216.in-addr.arpa. 79593	IN	NS	dns-01-001.root-dns.com.
> 255.133.216.in-addr.arpa. 79593	IN	NS	dns-01-002.root-dns.com.
>
> ;; ADDITIONAL SECTION:
> dns-01-001.root-dns.com. 165990	IN	A	64.7.192.162
> dns-01-002.root-dns.com. 165990	IN	A	64.7.192.163
>
> ;; Query time: 165 msec
> ;; SERVER: 64.7.192.163#53(64.7.192.163)
> ;; WHEN: Wed Aug 16 15:00:13 2006
> ;; MSG SIZE  rcvd: 139
>
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org

In addition, dns-01-001.root-dns.com references a non-existent A record.

	NET-allocation-00025443.ix.sitestream.net

This was reported at the end of the original message.

Also, there are no name servers for ix.sitestream.net.

Merton Campbell Crockett
m.c.crockett at adelphia.net





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