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- Newsgroups: comp.mail.misc
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!decwrl!sdd.hp.com!zaphod.mps.ohio-state.edu!caen!batcomputer!munnari.oz.au!metro!dmssyd.syd.dms.CSIRO.AU!marka
- From: marka@syd.dms.CSIRO.AU (Mark Andrews)
- Subject: Re: Inter-Network Mail Guide
- Message-ID: <Bx9opq.36C@syd.dms.CSIRO.AU>
- Sender: news@syd.dms.CSIRO.AU
- Organization: CSIRO Division of Mathematics and Statistics, Australia
- References: <1992Nov3.144316.28665@lut.ac.uk> <1992Nov5.024040.13063@kirk.bu.oz.au> <Bx9F6x.EK8@comp.vuw.ac.nz>
- Date: Thu, 5 Nov 1992 23:46:36 GMT
- Lines: 55
-
- In article <Bx9F6x.EK8@comp.vuw.ac.nz> Andy.Linton@comp.vuw.ac.nz (Andy Linton) writes:
- >
- >In article <1992Nov5.024040.13063@kirk.bu.oz.au>, bambi@bu.oz.au (David J. Hughes) writes:
- >|> C.V.Copas@lut.ac.uk writes:
- >|>
- >|> >Well it doesn't SEEM to be a FAQ, so here goes. I wish to get mail to an
- >|> >Australian machine
- >|> >which I can verify is on the Internet by using <nslookup>. However, all my mail
- >|> >vanishes into oblivion without any feedback to myself. Nor am I able to <ping>
- >|> >the machine. Therefore, I have reasoned that I need to supply a routing node
- >|> >specification, yes? Question: do any tools exist for determining that node?
- >|>
- >|>
- >|> You can use nslookup to find the MX relay host for your target. Many
- >|> hosts down here are in the DNS but don't actually connect to the net
- >|> (ie. similar to usage of UUCP in the State etc.).
- >|>
- >|> If you can't get it through the MX gateway, you can always drop the
- >|> postmaster on that host a line to find out why.
- >
- >I mailed Conn about this and it transpires that he and I can telnet to port 25 on
- >the machine but not ping it. There is no MX for the host concerned but there
- >is an MX for dsto.gov.au which points to fang.dsto.gov.au first and then to
- >yoyo.aarnet.edu.au
- >
- >e.g.
- >
- >$ telnet csd0.dsto.gov.au 25
- >Trying 131.185.10.4...
- >Connected to csd0.dsto.gov.au.
- >Escape character is '^]'.
- >220 CSD0.DSTO.GOV.AU TGV/MultiNet SMTP service ready.
- >helo bats.comp.vuw.ac.nz
- >250 CSD0.DSTO.GOV.AU ; Hello bats.comp.vuw.ac.nz, pleased to meet you.
- >vrfy postmaster
- >250 CSD Postmaster <postmaster>
- >quit
- >221 CSD0.DSTO.GOV.AU TGV/MultiNet SMTP service complete.
- >Connection closed by foreign host.
- >
- >But if you 'ping' it you get:
- >
- >$ ping csd0.dsto.gov.au.
- >ICMP Host Unreachable from gateway dsto.gw.au (139.130.176.2)
- > for icmp from bats.comp.vuw.ac.nz (130.195.8.13) to csd0.dsto.gov.au (131.185.10.4)
- >
- >I suspect it's some sort of security measure in the router but it's a little
- >strange.
-
- Not all that strange. DSTO is Defence Science and Technology Organization.
- I would expect them to prevent any unknow traffic from crossing their
- routers.
-
- Mark.
-
-