Date: Tue, 14 Aug 2001 13:50:11 +0930 From: Greg Lehey <grog@FreeBSD.org> To: cjclark@alum.mit.edu Cc: admin@FreeBSD.org, Terry Lambert <tlambert2@mindspring.com>, Mike Meyer <mwm@mired.org>, j mckitrick <jcm@FreeBSD-uk.eu.org>, freebsd-chat@FreeBSD.org Subject: Re: Blocking earthlink (was: How did the MSFT monopoly start?) Message-ID: <20010814135011.B61413@wantadilla.lemis.com> In-Reply-To: <20010810005706.B6485@blossom.cjclark.org>; from cristjc@earthlink.net on Fri, Aug 10, 2001 at 12:57:06AM -0700 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> <20010810001105.A6407@blossom.cjclark.org> <20010810164617.H37968@wantadilla.lemis.com> <20010810005706.B6485@blossom.cjclark.org>
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On Friday, 10 August 2001 at 0:57:06 -0700, Crist J. Clark wrote: > On Fri, Aug 10, 2001 at 04:46:17PM +0930, Greg Lehey wrote: > > [snip] > >>> 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. >> >> Hmm. Looks like a firewall rule. I don't know if that's intended; >> I'm copying admin@, who will possibly reply. > > I think you may have misunderstood. I believe _Earthlink_ is blocking > outgoing SMTP (25/tcp) as an anti-spam measure. That machine producing > the ICMP unreachable is my first hop, Ah, sorry. Yes, that seems reasonable. Why are you trying to send mail directly rather than through the Earthlink SMTP servers? Greg -- See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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