> > > 3. All of our FC2 servers recently (3-4 days ago) stopped serving > > > http pages to mac computers. I have no idea why, but customers > > > from all over is complaining that their mac machines cannot > > > open the webpages. Windows machines on the same net works. > > > The mac machines has tested IE and newest Safari. > > > It seems like a FC2 yum update triggered this event, but we have > > > no idea how and have no way of doing testing as we don't have any > > > macs. > > > > Does this problem go away if you set /proc/sys/net/ipv4/tcp_default_win_scale > > to 1 ? > > Thanks, waiting for testing reply from customer. Yes, the problem did go away. I have told the customers that they should check their routers/firewalls, but I'm not sure they actually will find the problem in a reliable manner without comparing with a working one. The strange thing is that it works for windows machines behind the very same router. -HK