>What am I missing? Why did I get the reverse DNS note?
>
>---from www.DNSstuff.com---
>Reverse DNS for 209.184.248.29
>Generated by www.DNSstuff.com
>How I am searching:
>Searching for PTR record for 29.248.184.209.in-addr.arpa at
>h.root-servers.net: Got referral to BUCHU.ARIN.NET.
>Searching for PTR record for 29.248.184.209.in-addr.arpa at
>BUCHU.ARIN.NET.: Got referral to NS1.SWBELL.NET.
>Searching for PTR record for 29.248.184.209.in-addr.arpa at
>NS1.SWBELL.NET.: Got referral to wildcat.elkhart.com.
>Searching for PTR record for 29.248.184.209.in-addr.arpa at
>wildcat.elkhart.com.: Reports mail.elkhart.com.
There seems to be a problem with the swbell.net servers. Sometimes, they
are responding with one answer, sometimes with another. For example:
Searching for PTR record for 29.248.184.209.in-addr.arpa at
NS1.SWBELL.NET.: Got referral to ns1.swbell.net.
Searching for PTR record for 29.248.184.209.in-addr.arpa at
ns1.swbell.net.: Got referral to wildcat.elkhart.com.
Searching for PTR record for 29.248.184.209.in-addr.arpa at
wildcat.elkhart.com.: Reports mail.elkhart.com.
Here, ns1.swbell.net is referring the answer back to itself, and on the
second try is responding correctly. It sounds like they may have the IP
for ns1.swbell.net point to multiple servers, some of which are set up
properly, and others are not.
I'm guessing that our local DNS server sees ns1.swbell.net referring us
back to itself, and assumes that an infinite loop will result (whereas the
www.DNSstuff.com lookup will only detect an infinite loop if more than 20
lookups are performed). The swbell.net people need to fix the problem.
-Scott
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