Date: Thu, 11 Dec 1997 01:30:13 -0500 (EST) From: Open Systems Networking <opsys@mail.webspan.net> To: freebsd-hackers@freebsd.org Subject: TCP problem Message-ID: <Pine.BSF.3.95.971211012018.2070A-100000@orion.webspan.net>
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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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