Date: Wed, 10 Dec 1997 23:48:41 -0800 (PST) From: Jaye Mathisen <mrcpu@cdsnet.net> To: Open Systems Networking <opsys@mail.webspan.net> Cc: freebsd-hackers@freebsd.org Subject: Re: TCP problem Message-ID: <Pine.NEB.3.95.971210234750.14624P-100000@mail.cdsnet.net> In-Reply-To: <Pine.BSF.3.95.971211012018.2070A-100000@orion.webspan.net>
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Seems to me I remember somebody saying something about a similar situation, and it was fixed by changing the MTU to something else... But I'm a bit fuzzy on it. Might try searching the hackers archive, seems to me it was Jordan that sent the original messages. On Thu, 11 Dec 1997, Open Systems Networking wrote: > > There seem's to be a problem with FreeBSD machines on ppp dialup accessing > certain web servers running so FreeBSD on the web server. > > Myself and a person in the UK have noticed the same thing. > > The only thing i can see in common is that both of us having this problem > are dialing into a xylogics annex terminal server. > > 2 example sites that seem to give this problem connecting to are: > resnet.uoregon.edu (Where Doug White's pages are) > and www.netcraft.co.uk. > > Going and using lynx on the ISP's shell box works just fine to these > sites. > It's something between us and them. > Which is the term server, and our os. > > I am running FreeBSD-current > FreeBSD opsys 3.0-CURRENT FreeBSD 3.0-CURRENT #0: Sun Dec 7 19:05:12 CST 1997 > > I have included output of tcpdump below of a request to www.netcraft.co.uk: > > # tcpdump -vv -i tun0 port 80 > tcpdump: listening on tun0 > 00:24:46.459429 port4.idtswe2.idir.net.1307 > www.netcraft.co.uk.http: S > 374134 > 3599:3741343599(0) win 16384 <mss 536,nop,wscale 0,nop,nop,timestamp > 395833 0,n > op,nop,cc[|tcp]> (DF) (ttl 64, id 49789) > 00:24:46.984205 www.netcraft.co.uk.http > port4.idtswe2.idir.net.1307: S > 698923 > 250:698923250(0) ack 3741343600 win 16512 <mss 1460,nop,wscale > 0,nop,nop,timest > amp 2733943 395833,nop,nop,cc[|tcp]> (DF) (ttl 48, id 57682) > 00:24:46.984353 port4.idtswe2.idir.net.1307 > www.netcraft.co.uk.http: . > ack 1 > win 16512 <nop,nop,timestamp 395834 2733943,nop,nop,cc 4306> (DF) (ttl 64, > id 4 > 9792) > 00:24:46.987660 port4.idtswe2.idir.net.1307 > www.netcraft.co.uk.http: P > 1:274( > 273) ack 1 win 16512 <nop,nop,timestamp 395834 2733943,nop,nop,cc 4306> > (DF) (ttl 64, id 49793) > > If more output is needed just ask. >
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