Just started recently on a fedora 14 machine where my upload speed between 2 machines on gigabit switches over SFTP went from 11-12mbs to 33kbs.
I have tried the following: restarted the network service, FTP instead of SFTP, restarted the machine, checked the cables, used iptraf and found nothing really going on, testing sftp to the machine I'm normally sending from and it was 12mbs and tried uploading from another machine to the same endpoint and the speed was about 12mbs. Only outbound from this machine to anywhere is dog slow.
Iptables is not on. I'm tapped for ideas.