On Tue, 2010-02-09 at 11:25 +0800, Ed Greshko wrote: > That is starting to stir the synapse.... > > The problem is related to what is in the "syn, ack" packet coming from > 12.17.249.39. In the TCP Options it is sending "Window scale: 0 > (multiply by 1)". I think this is causing problems since later packets > have the TCP data segment being only 92 bytes from 12.17.249.39. > > While the same info is in the "syn, ack" the RHELv4 system seems to deal > with it OK and the TCP data segments from 12.17.249.39 are 1460 bytes. > > The "problem" can be fixed by.... > > echo 0 > /proc/sys/net/ipv4/tcp_window_scaling > > Now, while this fixes the problem for this site it may cause performance > issues with other sites. I don't know at this point and my head hurts. > :-) It is hurting since my RHELv4 system has tcp_window_scaling set to > 1 and it seems to deal with it. > Note: Make sure you issue the "echo" above after some quite time. The > connection must first be rst (reset) before the sides will renegotiate > the TCP/IP settings. (That too caused me some grief.) Questions: a) does an "echo 1 /proc/sys/net/ipv4/tcp_window_scaling" put the system back to what it is now ? $cat /proc/sys/net/ipv4/tcp_window_scaling 1 b) does the command have to be issued after every reboot / login ? c) please tell us more on resetting the network connection. > I'll bugzilla it.... Thanks ! -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
