Date: Tue, 17 Nov 1998 19:15:27 -0500 (EST) From: Barrett Richardson <ratbert@phoenix.aye.net> To: John Heyer <john@jfive.com> Cc: FreeBSD-isp@FreeBSD.ORG Subject: Re: Just Plain Weird problem Message-ID: <Pine.BSF.3.96.981117185936.280A-100000@phoenix.aye.net> In-Reply-To: <Pine.BSF.3.96.981115225314.24503A-100000@snake.supranet.net>
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Try hitting sites that you know are running FreeBSD (www.freebsd.org, ftp to ftp.cdrom.com, www.best.com, www.aye.net, www.etinc.com). I had a similar problem with a WAN card in 2.2.5, connections to other FreeBSD boxes worked flawlessly, connections to micros**t boxes, peering with other routers would hang, but packets would route ok. Try turning off tcp_extensions in rc.conf, it didn't help me. With some tests I ran on mine, the problem was somewhat data dependant. I could put a text file with a bunch of a's in it in on an sgi box, and it would work ok. I could grab a file with random data in it, and it would hang. Could duplicate the same behaviour with kermit over tcp with ridiculously small packets (90 bytes). Something I never did was watch the ACKs with tcpdump to see if something was different there with good connections vs. bad connections. - Barrett On Mon, 16 Nov 1998, John Heyer wrote: > > After setting up a FreeBSD 2.2.7 proxy/mail server off-site for a client, > we noticed it to be having trouble sending mail to and from our primary > DNS/mail server. Even though finger and talk worked fine, telnet, ssh, > ftp, mail, and http would all hang regardless of which way we were going. > Futhermore, we noticed the new server doing the same thing for sites such > as www.sgi.net, but working fine for say, www.yahoo.com. Traceroute and > ping to anywhere works fine. > > At the time the new machine was running sendmail 8.9.1, named, socks 5, > squid 2.1 and had 2 intel etherexpress pro cards, but after disabling > everything including the second ethernet card and rebooting, nothing > changed. > > And in a truly weird thing, http to sunsite.unc.edu works fine but ftp to > it hangs (yes, both were up at the time). This is the part that's truly > baffling. > > All I can think of a this point is that it's a bad ethernet card or a > corrupted installation. It's definately not a routing issue (i.e. > www.iup.edu won't work but www.co.iup.edu is fine), and probably isn't > DNS since doing nslookup on just about anything from the new server works > fine. > > Any ideas? A quick look at TCP dump shows the client machine just sending > out packets but never getting a reply. They are on a dialup connection > with a Compatible MicroRouter, but no filtering that I'm aware of. > > -- > john@arnie.jfive.com > > "Mr. Spock, your mind is incedibly logical and analytical!" > > "Thank you." > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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