Date: Fri, 10 Aug 2001 00:57:06 -0700 From: "Crist J. Clark" <cristjc@earthlink.net> To: Greg Lehey <grog@FreeBSD.org> 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: <20010810005706.B6485@blossom.cjclark.org> In-Reply-To: <20010810164617.H37968@wantadilla.lemis.com>; from grog@FreeBSD.org on Fri, Aug 10, 2001 at 04:46:17PM %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> <20010810001105.A6407@blossom.cjclark.org> <20010810164617.H37968@wantadilla.lemis.com>
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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, $ traceroute hub.freebsd.org traceroute to hub.freebsd.org (216.136.204.18), 64 hops max, 40 byte packets 1 nas16.sjo1.Level3.net (209.244.43.80) 114.970 ms 118.485 ms 109.333 ms 2 gigabitethernet7-0-1.core2.SanJose1.Level3.net (63.215.14.3) 109.087 ms gigabitethernet7-0-2.core2.SanJose1.Level3.net (63.215.15.3) 108.277 ms gigabitethernet7-0-1.core2.SanJose1.Level3.net (63.215.14.3) 107.879 ms 3 gigabitethernet10-2.ipcolo3.SanJose1.Level3.net (64.159.2.169) 107.590 ms 108.293 ms 108.825 ms 4 cust-int.level3.net (64.152.69.18) 109.094 ms 118.089 ms 109.310 ms 5 ge-1-3-0.msr1.pao.yahoo.com (216.115.100.150) 109.079 ms 108.327 ms 109.108 ms 6 vl22.bas1.sc5.yahoo.com (216.115.100.233) 118.835 ms 108.502 ms 109.206 ms 7 hub.freebsd.org (216.136.204.18) 118.861 ms 108.087 ms 118.898 ms -- Crist J. Clark cjclark@alum.mit.edu To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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