That worked! I modified just the server side, executed a few test iterations, and it worked. -----Original Message----- From: Phil Oester [mailto:kernel@xxxxxxxxxxxx] Sent: Wednesday, January 24, 2007 6:43 PM To: Auke Kok Cc: Tate Hansen; 'Stephen Hemminger'; linux-net@xxxxxxxxxxxxxxx Subject: Re: Slow TCP transfers / only FC5 <-> FC5 On Wed, Jan 24, 2007 at 05:36:00PM -0800, Auke Kok wrote: > >The path goes like: > >FC5 -> router -> firewall -> INET -> router -> firewall > FC5 > > > >Additional info: > >- UDP & ICMP bandwidth is fine, only TCP is slow. > >- Other non-FC5 clients are fine as well (i.e. TCP xfers are not slow) > >- We are not tunneled over VPN > > maybe the extra information helps us recognize an already known problem? Could be the router or firewall is broken with TCP window scaling, which I believe FC5 kernels would have enabled by default. See if this: echo 0 > /proc/sys/net/ipv4/tcp_window_scaling helps improve transfer speed. Phil - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
