Search Again: Re: Setting Up Reverse DNS Query From: Stuart Douglas Date: Monday, January 17, 2005 Time: 8:01:02 am At 3:28 PM +0000 11/9/04, Stuart Douglas wrote: >From: "Men & Mice Support" <cbuxton@menandmice.com> >Date: Mon, 8 Nov 2004 09:46:00 -0800 > >>Setting up reverse DNS records isn't as straightforward as it sounds. >>First, you must figure out if the reverse zone belongs to your server. > >>With a regular domain name, when you register the domain, it's >>delegated to your server. A reverse zone must be similarly delegated, >>but "registration" is typically handled with your ISP rather than >>with a central registrar. > >>I looked up the PTR record delegation for ns.groovychocolate.com. The >>ednet.co.uk servers do in fact delegate your reverse records to your >>server. The zone name (called "domain name" in QuickDNS Pro 2.x) is: > >>233.20.212.in-addr.groovychocolate.com. > >>Creative, and perfectly legal. You don't even need to separate these >>into a reverse zone if you don't want to - just create records like >>this for each of your IP addresses: > >>82.233.20.212.in-addr.groovychocolate.com. PTR mail.groovychocolate.com. > >Ah, I was doing fine until this point Chris - our mail server and >Quick DNS are both on the 82 box, so I've already got a record : > >82.233.20.212.in-addr.groovychocolate.com. PTR ns.groovychocolate.com > >Is it allowable to have both records, ie: > >82.233.20.212.in-addr.groovychocolate.com. PTR mail.groovychocolate.com >82.233.20.212.in-addr.groovychocolate.com. PTR ns.groovychocolate.com It's not against the rules, but it's a bad idea in this case. You should have just the one pointing to mail.groovychocolate.com. I thought I;d done this right after your help, but today when one of our users tried to mail someone at easy.com they got a bounce back from the email admin there saying that we did not in fact have Reverse DNS setup for our mail server. The situation with our DNS server (which I took over responsibility for when our CTO left) is as follows: We have two Primary Domains set up, groovychocolate.com 0.233.20.212.in-addr.arpa Our mail server and DNS server both reside on a mac cube with IP 212.20.233.82. In the Primary Domain groovychocolate.com, we have (amongst others) these records groovychocolate.com NS ns.groovychocolate.com groovychocolate.com MX 10 mail.groovychocolate.com mail.groovychocolate.com A 212.20.233.82 ns.groovychocolate.com A 212.20.233.82 web.groovychocolate.com CNAME ns.groovychocolate.com and in the Primary Domain 0.233.20.212.in-addr.arpa we have the following entries: 82.0.233.20.212.in-addr.arpa PTR mail.groovychocolate.com I'm not entirely sure why there is a zero in the 0.233.20.212.in-addr.arpa domain, but presumably that's required since it's always been there? Could someone suggest what we need to add (a CNAME to groovychocolate.com perhaps?) Regards Stuart D

Messages In This Thread: Setting Up Reverse DNS Query by Stuart Douglas on Nov 8, 2004 at 7:06:06 am Re: Setting Up Reverse DNS Query by Men & Mice Support on Nov 8, 2004 at 9:48:05 am Re: Setting Up Reverse DNS Query by Stuart Douglas on Nov 9, 2004 at 7:28:43 am Re: Setting Up Reverse DNS Query by Men & Mice Support on Nov 9, 2004 at 1:58:12 pm Re: Setting Up Reverse DNS Query by Stuart Douglas on Nov 11, 2004 at 9:13:07 am Re: Setting Up Reverse DNS Query by Men & Mice Support on Nov 11, 2004 at 9:37:42 am Re: Setting Up Reverse DNS Query by Stuart Douglas on Jan 17, 2005 at 8:01:02 am Re: Setting Up Reverse DNS Query by Men & Mice Support on Jan 17, 2005 at 11:48:15 am Re: Setting Up Reverse DNS Query by Stuart Douglas on Jan 19, 2005 at 3:42:42 am Re: Setting Up Reverse DNS Query by Men & Mice Support on Jan 19, 2005 at 11:25:53 am Re: Setting Up Reverse DNS Query by Stuart Douglas on Jan 21, 2005 at 8:51:36 am Re: Setting Up Reverse DNS Query by Men & Mice Support on Jan 21, 2005 at 10:15:33 am