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Re: Reverse DNS

From: Global Homes Webmaster
Date: Friday, June 30, 2000
Time: 11:32:04 am

On 06/30/00 at 10:30, Caio James wrote:

> Can you check now to see if reverse dns is properly setup? I talked to my
> ISP this morning and they said they've changed the reverse dns allocation to
> point to my dns servers..

Looking up the PTR for your MX (mail.intric.com. - 207.38.101.31) I get:

a.root-servers.net. delegates the zone to inno-tech and webdudes,

101.38.207.IN-ADDR.ARPA. 6D IN NS NS1.INNO-TECH.COM.
101.38.207.IN-ADDR.ARPA. 6D IN NS NS.WEBDUDES.COM.

When queried for 31.101.38.207.in-addr.arpa., ns1.inno-tech.com. gives only
the SOA record for the zone,

101.38.207.in-addr.arpa. 1D IN SOA ns1.inno-tech.com.
gruzzier.inno-tech.com.
(
2000032300 ; serial
8H ; refresh
2H ; retry
1W ; expiry
1D ) ; minimum

A zone transfer of 101.38.201.in-addr.arpa. from ns1.inno-tech.com. returns a
bunch of PTR records, but none for any hosts in intric.com.

ns.webdudes.com. returns no records at all for the 101.38.207.in-addr.arpa.
zone.

You need to get Inno-tech to either delegate the reverse zone for your IPs to
your name server (it will probably need to be a classless delegation, since it
looks like they've got several customers in the same Class C block) or add
your PTR records to their zone file. You also need to have someone clean up
the lame delegation to Webdudes (either ns.webdudes.com. needs to be set up to
serve the zone or the delegation needs to be removed from the root servers).

Christopher Bort



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