Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!zaphod.mps.ohio-state.edu!mips!bridge2!mdb From: mdb@ESD.3Com.COM (Mark D. Baushke) Newsgroups: comp.mail.misc Subject: Re: Does this host exist? Message-ID: Date: 24 Jul 90 07:19:37 GMT References: <209@adam.adelaide.edu.au> Sender: news@bridge2.ESD.3Com.COM Organization: 3Com Corp., Mountain View, CA. Lines: 68 In-reply-to: mferrare@adelphi.ua.oz.au's message of 24 Jul 90 02:11:17 GMT On 24 Jul 90 02:11:17 GMT, mferrare@adelphi.ua.oz.au (Mark Ferraretto) said: Mark> I have been trying to telnet to hosts with the following Mark> Internet Numbers. Mark> 128.189.128.2 Mark> 128.189.128.4 Mark> but I get no response. Does that mean that these numbers are Mark> wrong? It could be you got them wrong... What hosts do you expect to contact? Mark> If not what hosts are they? Hmmm...provided that they have been assigned, they could be hosts or some other kind of device that lives in an IP world. Let's see if we can find out what their domain names are... % dig any 2.128.189.128.in-addr.arpa. ; <<>> DiG <<>> any 2.128.189.128.in-addr.arpa. ;; ->>HEADER<<- opcode: QUERY , status: NXDOMAIN, id: 6 ;; flags: qr aa rd ra Ques: 1, Ans: 0, Auth: 1, Addit: 0 ;; QUESTIONS: ;; 2.128.189.128.in-addr.arpa, type = ANY, class = IN ;; AUTHORITY RECORDS: 189.128.in-addr.arpa IN SOA relay.cdnnet.ca demco.relay.cdnnet.ca ( 199007100 ;serial 21600 ;refresh 900 ;retry 604800 ;expire 43200 ;minim ) ; 43200 ;; Sent 1 pkts, answer found in time: 2.174 sec ;; FROM: kosciusko.ESD.3Com.COM to SERVER: default ;; WHEN: Tue Jul 24 00:11:08 1990 % dig ptr 4.128.189.128.in-addr.arpa. ; <<>> DiG <<>> ptr 4.128.189.128.in-addr.arpa. ;; ->>HEADER<<- opcode: QUERY , status: SERVFAIL, id: 6 ;; flags: qr rd ra Ques: 1, Ans: 0, Auth: 0, Addit: 0 ;; QUESTIONS: ;; 4.128.189.128.in-addr.arpa, type = PTR, class = IN ;; Sent 2 pkts, answer found in time: 4.92 sec sent 1 too many pkts ;; FROM: kosciusko.ESD.3Com.COM to SERVER: default ;; WHEN: Tue Jul 24 00:16:02 1990 Well, there do not appear to be any PTR records for those addresses. Given the 18.128.in-addr.arpa domain belongs to relay.cdnnet.ca and the e-mail contact for that domain should be demco@relay.cdnnet.ca, you might find out more by asking demco directly. Mark> Sorry if I've sent this message to the wrong group - please Mark> direct me to the right one. Enjoy! -- Mark D. Baushke mdb@ESD.3Com.COM