4 Oct
2010
4 Oct
'10
3:59 p.m.
Hi All,
I'm puzzled, and hope you all can help - the machine is almost ready, so I'll
stop bothering you soon, promise!
So I seem to have set up my bind9 and sendmail software.
% host -a exoco.net
% dig +short -t mx exoco.net @212.13.195.120
% nslookup exoco.net
all work fine.
% telnet exoco.net 587
does too.
Why does
% telnet exoco.net 25
from an external machine not work (it hangs), while it does function at the
local?
What am I missing??
TIA,
Max
4 Oct
4 Oct
4:03 p.m.
On Mon, 2010-10-04 at 08:59 -0700, Max B wrote:
% telnet exoco.net 25
from an external machine not work (it hangs), while it does function
at the local?
What am I missing??
It works from where I am. So it's probably the ISP you're using to
access the internet which is blocking your access. Orange are one who do
that, I'm sure there are plenty of others.
Thanks
Alex.
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4:04 p.m.
Hi Max,
On Mon, Oct 04, 2010 at 08:59:43AM -0700, Max B wrote:
Why does
% telnet exoco.net 25
from an external machine not work (it hangs), while it does function at the
local?
Works for me:
$ telnet 212.13.195.120 25
Trying 212.13.195.120...
Connected to 212.13.195.120.
Escape character is '^]'.
220 exoco.net ESMTP Sendmail 8.14.3/8.14.3/Debian-5+lenny1; Mon, 4 Oct 2010 16:01:03 GMT;
(No UCE/UBE) logging access from: [212.13.194.70](FORGED)-bitfolk.com [212.13.194.70] (may
be forged)
What am I missing??
Perhaps the place where you are testing from blocks port 25
outbound. It's pretty common.
tcptraceroute 212.13.195.120 25
from your source would be enlightening.
From my home:
Selected device br0, address 192.168.0.8, port 53128 for outgoing packets
Tracing the path to 212.13.195.120 on TCP port 25 (smtp), 30 hops max
1 192.168.0.7 1.575 ms 0.644 ms 0.654 ms
2 192.168.1.1 1.649 ms 1.691 ms 1.716 ms
3 losubs.subs.dsl2.th-lon.zen.net.uk (62.3.84.21) 33.656 ms 33.424 ms 35.651 ms
4 ge-0-0-0-115.cr2.th-lon.zen.net.uk (62.3.84.189) 33.637 ms 28.269 ms 29.675 ms
5 linx-gw-a.jump.net.uk (195.66.224.34) 31.616 ms 33.327 ms 33.388 ms
6 urquell.bitfolk.com (212.13.195.220) 34.582 ms 32.428 ms 36.621 ms
7 exoco.net (212.13.195.120) [open] 34.637 ms 39.463 ms 38.665 ms
Cheers,
Andy
--
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"The electric guitar - like making love - is much improved by a little
feedback, completely ruined by too much." -- The League Against Tedium
5:31 p.m.
On 4 Oct 2010, at 16:59, Max B wrote:
[snip]
Why does
% telnet exoco.net 25
from an external machine not work (it hangs), while it does function at the local?
What am I missing??
You're missing the fact that you appear to be connecting via Uni of Soton's resnet
network, who block tcp/25 outbound and recommend you use smtp.soton.ac.uk for sending mail
instead. Best to do testing from outwith a traffic-managed/filtered network.
-n
5:39 p.m.
On 4 Oct 2010, at 16:59, Max B wrote:
[snip]
Why does
% telnet exoco.net 25
from an external machine not work (it hangs), while it does function at the local?
What am I missing??
You're missing the fact that you appear to be connecting via Uni of Soton's resnet
network, who block tcp/25 outbound and recommend you use smtp.soton.ac.uk for sending mail
instead. Best to do testing from outwith a traffic-managed/filtered network.
-n
6:06 p.m.
Hi William/All,
yes, you hit the nail on the head with that one.
I now can see the email sent to 'root(a)exoco.net' and have now progressed to
writing a procmail script. I should be satisfied with my new server soon...
Thanks to all who contributed to this (lengthy) network tutorial.
Cheers,
Max
________________________________
From: William Anderson <neuro(a)well.com>
To: users(a)lists.bitfolk.com
Sent: Mon, October 4, 2010 6:39:50 PM
Subject: Re: [bitfolk] external machines cannot see port 25??
On 4 Oct 2010, at 16:59, Max B wrote:
[snip]
Why does
% telnet exoco.net 25
from an external machine not work (it hangs), while it does function at the
local?
What am I missing??
You're missing the fact that you appear to be connecting via Uni of Soton's
resnet network, who block tcp/25 outbound and recommend you use smtp.soton.ac.uk
for sending mail instead. Best to do testing from outwith a
traffic-managed/filtered network.
-n
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