The window scaling thing in 2.6.7 kernels could also be the reason why i'm having trouble retrieving email from my isp (skynet.be). I can get pop3 email with all 2.6.6 kernels, but not with the latest 2.6.7 (referring to official fedora kernels, of course) It also looks like my last tcp packet doesn't arrive at my isp, since i don't get any response after a 'larger' pop command (list, retr)... gotta keep on searching... ----------------------- (a bit later) I just tried to disable window scaling via sysctl, and hey... it works again! (sysctl -w net.ipv4.tcp_window_scaling=0) maybe you can try to do that, and see if it works for your client... does anyone have an idea what might be wrong on the isp's routers to have these problems? (they're using cisco and juniper iron...) or is it a kernel bug? thanks, bye, david. On Fri, 2004-08-13 at 16:31, Dave Jones wrote: > On Fri, Aug 13, 2004 at 03:28:19PM +0100, David Woodhouse wrote: > > On Fri, 2004-08-13 at 14:26 +0200, Hans Kristian Rosbach wrote: > > > > > MacOs 10. something is what the customer told me. > > > > > I have just about zero chance of getting them to do a tcpdump for me. > > > > > If anybody wants to try, one of the domains in question is www.fjuken.no > > > > Works for me from MacOS X. > > My suspicion is that theres a router between his customer and himself > that has broken window scaling. Post 2.6.7 kernels changed the default > amount of scaling. > > Dave >
