The problem is with the DNS servers...
 
 
 
DNSSTUFF shows the authoritative DNS servers being:
 
Your NS records at the parent servers are:
dns.skywaves.com. [67.100.228.186] [TTL=172800] [US]
dns.skywaves.net. [216.0.164.2] [TTL=172800] [US]
[These were obtained from h.gtld-servers.net]
 
 
 
SAMSPADE.ORG shows the authoritative DNS servers as:
 
crofuttsmith.com = [ 216.0.165.244 ]
     Record expires on 17-Jul-2005.
     Record created on 18-Jul-1996.
     Database last updated on 28-Sep-2004 16: 45: 30 EDT.
     Domain servers in listed order:
     DNS.SKYWAVES.NET             216.0.164.2
     DNS.SKYWAVES.COM             216.0.165.3
 
 
See the problem? dns.skywaves.com has two different IP addresses. One is wrong.
 
That's probably where the problem is occuring.
 
 

Stan Lyzak

BSEE, CISSP, MCSEČ, CCNA, Security+, A+

Network Security Engineer

ASysTech, Inc.


 


From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave Doherty
Sent: Tuesday, September 28, 2004 4:29 PM
To: [EMAIL PROTECTED]
Subject: [Declude.JunkMail] DNS Puzzler

Hi,
 
I have one for you DNS experts out there.
 
We host DNS for a client that runs his own mail server, and we have received delegation from AT&T for his IP block.
 
I can see nothing wrong in our setup, yet some places can see the PTR record for his mail server's IP address, and some cannot. I have synchronized the name servers so they have exactly the same info.
 
The online Dig tool at Men and Mice shows the reverse lookup just fine, nslookup shows it also. But DNSReport.com reports that the server's address has no reverse lookup, as does DNSStuff.com
 
Particulars:
  mail.crofuttsmith.com, 12.20.208.99
  dns.skywaves.net
 
Any ideas appreciated!
 
Thanks as always.
 
-Dave Doherty
 Skywaves, Inc.
 
 

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