Doug, I have a similar problem with ssh between two Macs and found that as well as setting the MTU down to 576 I needed to ensure that I set: net.inet.tcp.delayed_ack: 1 with sysctl. My problem only seemed to start after I replaced my ADSL modem at home. i set MTU globally back to 576, and "sysctl -w net.inet.tcp.delayed_ack=1". alas, to no avail ... Question 4 you: if this were an issue, shouldn't I expect to see the same behavior/problem with/between all my machines? Why would this affect only one 'pair', and in one direction? Richard _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.