You are quite correct. Putting net.ipv4.tcp_window_scaling=0 into /etc/sysctl.conf and rebooting works I'll have to read more and understand the reasons and implications. Thanks for your help. Duncan > -----Original Message----- > From: fedora-list-bounces@xxxxxxxxxx > [mailto:fedora-list-bounces@xxxxxxxxxx] On Behalf Of Tomasz Torcz > Sent: 28 November 2007 11:05 > To: For users of Fedora > Subject: Re: TCP/HTTP Bug Fedora Core 8 (and 6) > > > > Dnia 28-11-2007, śro o godzinie 10:46 +0000, Duncan Berriman pisze: > > If a TCP/IP connection is made to a certain public web server > > then the transfer rate on Fedora Core 6 onwards is in the > > region of 100B/S (bytes per second). On Fedora Core 2 and > > Fedora Core 4 the speed is in the region of 300KB/s (Kbytes > > per second). > > That sounds like TCP window scaling bug on remote server. > Newer kernels > expose it. See http://lwn.net/Articles/92727/ > > -- > Tomasz Torcz > > -- > fedora-list mailing list > fedora-list@xxxxxxxxxx > To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. >