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Article #1449

Re: Does this host exist?

#1449
From: Mark D. Baushke
Date: Tue, 24 Jul 1990 07:19
68 lines
2615 bytes
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
Technical Details
Message-ID: <MDB.90Jul24001937@kosciusko.ESD.3Com.COM>
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!zaphod.mps.ohio-state.edu!mips!bridge2!mdb
References: <209@adam.adelaide.edu.au>

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Path: arc1-ca.pugleaf.net!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: <MDB.90Jul24001937@kosciusko.ESD.3Com.COM>
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