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Old 10-11-04, 12:33 PM   #2
gnarface
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Join Date: Sep 2004
Posts: 2
Lightbulb Re: wierd network problems with nforce2 and kernel 2.6.8.1

good news people!

after a lot of hunting online over the past couple days, i found out that the problem actually has nothing to do with the nforce2 board, its actually an incompatability between my router and a new default in the tcp subsystem of kernel 2.6.8.1. unfortunately the proper way to fix this issue requires a replacement router, or at least replacement router software, but here's the duct tape and bailing-wire fix:

echo 0 > /proc/sys/net/ipv4/tcp_default_win_scale

or add the line:

net.ipv4.tcp_default_win_scale = 0

to /etc/sysctl.conf.

... there's another variable you can set to turn off tcp window scaling altogether too. i don't understand it all that clearly myself but this seems to be decent explanation:

http://lwn.net/Articles/92727/

also, if you google search for: tcp_default_win_scale 2.6.8.1
then you will come up with a bunch of mailing lists and forums with people talking about this.

so the next question... anyone here happen to know how to fix this on an openbsd-based custom firewall?
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