Search Again: Re: Reverse DNS From: Men & Mice Support Date: Thursday, June 29, 2000 Time: 11:27:26 pm At 8:15 PM -0700 6/29/00, Caio James wrote: >Reverse DNS? What is this and how do I set it up? My dns servers seem to be >working fine without this, but one of my client's chat software needs >reverse dns to work properly.. Reverse records are used to map IP addresses back to names. It is important for workstations and mail servers to have accurate reverse (PTR) records. The top-level of the reverse zone system is in-addr.arpa. Subzones are made using the octets of your subnet, but in reverse order. In other words, if one of your IP addresses is 207.38.101.31, then its PTR record is named "31.101.38.207.in-addr.arpa.". That's potentially in each of the following zones: 101.38.207.in-addr.arpa. 38.207.in-addr.arpa. 207.in-addr.arpa. in-addr.arpa. I say "potentially" because not all of those are necessarily delegated zones. Here's the actual delegation, starting from the top: from f.root-servers.net: 101.38.207.in-addr.arpa. NS ns1.inno-tech.com. 101.38.207.in-addr.arpa. NS ns.webdudes.com. from ns1.inno-tech.com: The host or domain "31.101.38.207.in-addr.arpa." does not exist from ns.webdudes.com: non-authoritative answer (lame delegation) So on the ns1.inno-tech.com server, there is a file for the zone 101.38.207.in-addr.arpa. PTR records should be added to it until it has exactly one for every IP address in use within that class C subnet. (I used this IP address because it's the address of intric.com, the domain used in your email address.) ____________________________________________________________________ Chris Buxton cbuxton@menandmice.com Men & Mice http://www.menandmice.com Makers of: QuickDNS Pro

Messages In This Thread: Reverse DNS by Warren Michelsen on Oct 30, 1999 at 5:41:00 pm Re: Reverse DNS by Men & Mice Support on Oct 30, 1999 at 6:05:00 pm Re: Reverse DNS by Warren Michelsen on Oct 30, 1999 at 6:32:00 pm Re: Reverse DNS by Men & Mice Support on Oct 30, 1999 at 9:00:00 pm Reverse DNS by Caio James on Jun 29, 2000 at 8:23:23 pm Re: Reverse DNS by Men & Mice Support on Jun 29, 2000 at 11:27:26 pm Re: Reverse DNS by Caio James on Jun 29, 2000 at 11:42:19 pm Re: Reverse DNS by Caio James on Jun 29, 2000 at 11:47:06 pm Re: Reverse DNS by Caio James on Jun 29, 2000 at 11:57:17 pm Re: Reverse DNS by Men & Mice Support on Jun 30, 2000 at 1:25:25 am Re: Reverse DNS by Caio James on Jun 30, 2000 at 1:41:36 am Re: Reverse DNS by Men & Mice Support on Jun 30, 2000 at 1:57:37 am Re: Reverse DNS by Caio James on Jun 30, 2000 at 10:34:32 am Re: Reverse DNS by Global Homes Webmaster on Jun 30, 2000 at 11:32:04 am Re: Reverse DNS by Caio James on Jun 30, 2000 at 11:40:25 am Re: Reverse DNS by Global Homes Webmaster on Jun 30, 2000 at 12:57:28 pm Re: Reverse DNS by Men & Mice Support on Jun 30, 2000 at 4:22:19 pm Re: Reverse DNS by Mark Russon on Jul 1, 2000 at 1:48:56 pm Re: Reverse DNS by Jerry Pasker on Jul 1, 2000 at 3:48:51 pm Re: Reverse DNS by Jerry Pasker on Jul 1, 2000 at 4:03:01 pm Re: Reverse DNS by Men & Mice Support on Jul 2, 2000 at 1:33:42 am Reverse DNS by Paul Didzerekis on May 2, 2001 at 1:53:19 pm Re: Reverse DNS by Global Homes Webmaster on May 2, 2001 at 3:15:53 pm Re: Reverse DNS by Jim Grisham on May 3, 2001 at 5:47:38 pm Re: Reverse DNS by Global Homes Webmaster on May 3, 2001 at 6:09:12 pm Re: Reverse DNS by Men & Mice Support on May 3, 2001 at 7:08:22 pm Reverse DNS by Andrew Schmiechen on Jun 21, 2001 at 1:28:00 pm Re: Reverse DNS by Global Homes Webmaster on Jun 21, 2001 at 3:12:52 pm reverse DNS by Paul Didzerekis on Jun 21, 2001 at 3:43:12 pm Re: reverse DNS by Men & Mice Support on Jun 21, 2001 at 10:14:41 pm Re: reverse DNS by Paul Didzerekis on Jun 22, 2001 at 11:33:50 am Reverse DNS by Dan Tappin on Dec 4, 2001 at 8:01:31 am Re: Reverse DNS by Men & Mice Support on Dec 4, 2001 at 10:22:14 am Re: Reverse DNS by Robert Ameeti on Dec 4, 2001 at 10:32:07 pm Re: Reverse DNS by Men & Mice Support on Dec 5, 2001 at 1:01:47 am Re: Reverse DNS by Piero Marchetti on Feb 20, 2002 at 1:00:49 pm Re: Reverse DNS by Men & Mice Support on Feb 20, 2002 at 2:11:27 pm Re: Reverse DNS by Piero Marchetti on Feb 21, 2002 at 1:48:25 am Re: Reverse DNS by Men & Mice Support on Feb 21, 2002 at 12:04:54 pm Re: Reverse DNS by Piero Marchetti on Feb 22, 2002 at 4:22:28 am Re: Reverse DNS by Men & Mice Support on Feb 22, 2002 at 12:46:12 pm Re: Reverse DNS by Piero Marchetti on Feb 26, 2002 at 3:24:25 am reverse dns by Steve Nowacki on Jul 29, 2003 at 10:02:19 am Re: reverse dns by Len Conrad on Jul 29, 2003 at 10:16:15 am Re: reverse dns by Steve Nowacki on Jul 30, 2003 at 6:38:26 am Re: reverse dns by Len Conrad on Jul 30, 2003 at 7:45:23 am Reverse DNS by Larry Scott Hastings on Feb 11, 2005 at 1:52:38 pm Re: Reverse DNS by Men & Mice Support on Feb 11, 2005 at 4:22:20 pm Re: Reverse DNS by Larry Scott Hastings on Feb 14, 2005 at 10:40:02 am Re: Reverse DNS by admin@gippy.net on Feb 14, 2005 at 10:48:03 am Re: Reverse DNS by Larry Scott Hastings on Feb 14, 2005 at 1:14:07 pm Re: Reverse DNS by Men & Mice Support on Feb 15, 2005 at 7:09:31 am Re: Reverse DNS by Larry Scott Hastings on Feb 18, 2005 at 11:43:51 am Re: Reverse DNS by Men & Mice Support on Feb 19, 2005 at 8:13:59 am Re: Reverse DNS by Larry Scott Hastings on Feb 21, 2005 at 10:37:27 am Re: Reverse DNS by Men & Mice Support on Feb 21, 2005 at 2:47:51 pm Re: Reverse DNS by Larry Scott Hastings on Feb 23, 2005 at 1:29:40 pm Re: Reverse DNS by Men & Mice Support on Feb 23, 2005 at 3:50:29 pm Re: Reverse DNS by Michael Wise on Feb 23, 2005 at 3:55:11 pm