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Date:      Fri, 10 Aug 2001 00:11:05 -0700
From:      "Crist J. Clark" <cristjc@earthlink.net>
To:        Greg Lehey <grog@FreeBSD.ORG>
Cc:        Terry Lambert <tlambert2@mindspring.com>, Mike Meyer <mwm@mired.org>, j mckitrick <jcm@FreeBSD-uk.eu.org>, freebsd-chat@FreeBSD.ORG
Subject:   Re: How did the MSFT monopoly start?
Message-ID:  <20010810001105.A6407@blossom.cjclark.org>
In-Reply-To: <20010809124559.G73579@wantadilla.lemis.com>; from grog@FreeBSD.ORG on Thu, Aug 09, 2001 at 12:45:59PM %2B0930
References:  <20010806142544.A64348@dogma.freebsd-uk.eu.org> <15214.52633.581653.632317@guru.mired.org> <3B6F98D0.A3C22CC9@mindspring.com> <20010808160551.Q78395@wantadilla.lemis.com> <3B7103A4.558B9B3B@mindspring.com> <20010809124559.G73579@wantadilla.lemis.com>

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On Thu, Aug 09, 2001 at 12:45:59PM +0930, Greg Lehey wrote:
> On Wednesday,  8 August 2001 at  2:17:24 -0700, Terry Lambert wrote:
> > Greg Lehey wrote:
> >
> > Obviously, like my off the list references to the livelock papers
> > I tried to send you, the direct email to you will bounce from your
> > overambitious "spam" bouncer, which insists I'm a spammer because
> > Earthlink bought my ISP and assignned me a mindspring address...
> > Oh well...
> 
> Hmm.  I've checked my bounce log.  Is this you?
> 
>  Out: 220 wantadilla.lemis.com ESMTP Postfix
>  In:  EHLO smtp.netcabo.pt
>  In:  MAIL FROM:<nastyteen69@earthlink.net> SIZE=2352
>  Out: 450 Client host rejected: cannot find your hostname, [212.113.174.249]
> 
> That's the only reference I can find to Earthlink.  I reject this
> message, like many others, because it shows every sign of being spam.

I use Earthlink and it looks like someone's blocked outgoing port 25
from their network that is not going to their own mail servers. If I
do,

  $ telnet hub.freebsd.org 25
  Trying 216.136.204.18...
  telnet: connect to address 216.136.204.18: Network dropped connection on reset
  telnet: Unable to connect to remote host

I get blocked,

  # tcpdump -itun0 -n
  00:07:29.298296 209.244.105.174.1184 > 216.136.204.18.25: S 3233816272:3233816272(0) win 16384 <mss 1484,nop,wscale 0,nop,nop,timestamp 4821218 0> (DF) [tos 0x10] 
  00:07:29.435204 209.244.43.80 > 209.244.105.174: icmp: net 216.136.204.18 unreachable - admin prohibited

  $ host 209.244.43.80
  80.43.244.209.IN-ADDR.ARPA domain name pointer nas16.sjo1.Level3.net

I can otherwise access hub just fine. Only port 25 is affected.
-- 
Crist J. Clark                           cjclark@alum.mit.edu

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