Search Again: Re: nslookup give me the reverse From: Webmaster Date: Tuesday, June 6, 2000 Time: 9:05:09 am El 5/6/2000 22:00, QuickDNS Talk escribio - on 5/6/2000 22:00, QuickDNS Talk wrote >> 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. OK, but... is it all of this a problem for me or the zones I admin? Can I do something to get the answers before? or because I have a classless delegation I can't do nothing. Applications used quering for 195.53.92.111: supposed correct answer = www.eps.es OTTool = 111.64.92.53.195.in-addr.arpa. Bad answer in my point of view AGNetTools = 111.64.92.53.195.in-addr.arpa. Bad answer in my point of view WhatRoute = 111.64.92.53.195.in-addr.arpa. 172800 IN PTR www.eps.es. I dont understand this kind of answer nslookup = name: www.eps.es address: 195.53.92.111 aliases: 111.64.92.53.195.in-addr.arpa. (this line never was in my queries with nslookup -Win NT command-) Good answer in my point of view PINetTools = <nslookup:111.92.53.195.in-addr.arpa/*> Non-authoritative answer: 111.92.53.195.in-addr.arpa CNAME 169857 111.64.92.53.195.in-addr.arpa Authority: 53.195.in-addr.arpa NS 327955 minerva.ttd.net 194.179.1.100 53.195.in-addr.arpa NS 327955 artemis.ttd.net 194.179.1.101 53.195.in-addr.arpa NS 327955 ns.ripe.net 193.0.0.193 NSLookup normal completion. I dont understand this kind of answer <nslookup:111.92.53.195.in-addr.arpa/PTR> Non-authoritative answer: 111.92.53.195.in-addr.arpa CNAME 169668 111.64.92.53.195.in-addr.arpa 111.64.92.53.195.in-addr.arpa PTR 172800 www.eps.es Authority: 64.92.53.195.in-addr.arpa NS 172800 osiris.eps.es 195.53.92.99 64.92.53.195.in-addr.arpa NS 172800 artemis.ttd.net 194.179.1.101 NSLookup normal completion. I dont understand this kind of answer Please, I would like to know all this kind of things. PS: Digest, CC to me, please.

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