Thread View: comp.mail.misc
6 messages
6 total messages
Started by C.V.Copas
Tue, 03 Nov 1992 14:43
Inter-Network Mail Guide
Author: C.V.Copas
Date: Tue, 03 Nov 1992 14:43
Date: Tue, 03 Nov 1992 14:43
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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?
Re: Inter-Network Mail Guide
Author: Tim Goodwin
Date: Wed, 04 Nov 1992 15:48
Date: Wed, 04 Nov 1992 15:48
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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? No. This is the 1990s. If you need to supply an explicit route, something's broken. If you let me know the address, I'll see if I can find out what the problem is. BTW, I assume you did get in touch with your local postmaster first? Tim.
Re: Inter-Network Mail Guide
Author: David J. Hughes
Date: Thu, 05 Nov 1992 02:40
Date: Thu, 05 Nov 1992 02:40
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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. ___ David J. Hughes bambi@bu.oz.au / \ / / / / __/ __ __ ____/ / / __ Senior Network Programmer / \ / \ / \ / / / / / \ / Comms Development & Operation \____/ \__// / \__/ \___/ / / / AUSTRALIA (+61 75 951450)
Re: Inter-Network Mail Guide
Author: Andy Linton
Date: Thu, 05 Nov 1992 20:20
Date: Thu, 05 Nov 1992 20:20
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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.
Re: Inter-Network Mail Guide
Author: Mark Andrews
Date: Thu, 05 Nov 1992 23:46
Date: Thu, 05 Nov 1992 23:46
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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.
Re: Inter-Network Mail Guide
Author: David J. Hughes
Date: Fri, 06 Nov 1992 02:00
Date: Fri, 06 Nov 1992 02:00
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marka@syd.dms.CSIRO.AU (Mark Andrews) writes: >Not all that strange. DSTO is Defence Science and Technology Organization. >I would expect them to prevent any unknow traffic from crossing their >routers. We do the same thing and we're just a Uni :-). The only odd things is that SMTP connections are handled (even though the MX points elsewhere) but ICMP's are not passed. Our configuration will let ICMP's get to the box but all other services are blocked (ie. all MX's point to our central mail hub). ___ David J. Hughes bambi@bu.oz.au / \ / / / / __/ __ __ ____/ / / __ Senior Network Programmer / \ / \ / \ / / / / / \ / Comms Development & Operation \____/ \__// / \__/ \___/ / / / AUSTRALIA (+61 75 951450)
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