Search Again: Re: nslookup give me the reverse From: Men & Mice Support Date: Monday, June 5, 2000 Time: 9:50:06 am At 12:49 PM +0200 6/5/00, Webmaster wrote: >Hi > >I have a problem, when I do a nslookup for any of my IPs, OTTool (and >others) return me the reverse: > >I put 195.53.92.111 >and give me 111.64.92.53.195.in-addr.arpa. (As you see I have a classless >delegation) >and must be www.eps.es > >In other hand, if I put www.eps.es >give me 195.53.92.111 > >I have several domains in QDNS and everything was OK a few days ago, but >now... Could be mi ISP? and if so... what's the problem? It sounds like OTTool isn't following up on the CNAME. When I ask DNS Expert to look up PTR records for 195.53.92.111, it finds: 111.92.53.195.in-addr.arpa. CNAME 111.64.92.53.195.in-addr.arpa. 111.64.92.53.195.in-addr.arpa. PTR www.eps.es. 64.92.53.195.in-addr.arpa. NS artemis.ttd.net. 64.92.53.195.in-addr.arpa. NS osiris.eps.es. Note that the parent zone is delegated to one of these same servers: 92.53.195.in-addr.arpa. NS artemis.ttd.net. 92.53.195.in-addr.arpa. NS minerva.ttd.net. So if you ask artemis.ttd.net for PTR records for the address in question, you'll get the whole answer. If you ask minerva.ttd.net, you'll get only the first record, the CNAME - it is then up to the resolver to find the PTR record from there. Perhaps the resolver built into OTTool doesn't properly handle this case (called a dangling CNAME). So half the time, it should work fine, and the other half the time, it'll run into a dangling CNAME and fail. ____________________________________________________________________ Chris Buxton cbuxton@menandmice.com Men & Mice http://www.menandmice.com Makers of: QuickDNS Pro

Messages In This Thread: nslookup give me the reverse by Webmaster on Jun 5, 2000 at 3:49:01 am Re: nslookup give me the reverse by Men & Mice Support on Jun 5, 2000 at 9:50:06 am Re: nslookup give me the reverse by Webmaster on Jun 6, 2000 at 9:05:09 am Re: nslookup give me the reverse by Global Homes Webmaster on Jun 6, 2000 at 10:32:43 am Re: nslookup give me the reverse by Webmaster on Jun 7, 2000 at 12:41:26 am