Re: [Declude.JunkMail] DNS Puzzler

[Dave Doherty]

Good catch, Stan.   67.100.228.186 is correct. That is an old problem that I thought we quashed years ago. Network Solutions still has the old IP address. I have been through this with them as least three or four times.   I run a tertiary name server on 216.0.165.3, and it is also synchronized, so it provides the correct responses regardless of which address the request comes to.   -Dave     ----- Original Message ----- From: Stanley Lyzak To: [EMAIL PROTECTED] Sent: Tuesday, September 28, 2004 4:49 PM Subject: RE: [Declude.JunkMail] DNS Puzzler 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, MCSE�, 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.