[arch-general] ftp.archlinux.org rate limiting

Hi all, Could someone share the details of how the 50kbps rate-limit is implemented on ftp.archlinux.org? I know Google gives me plenty of results for rate-limiting with iptables and tc but I've never had much success with tc, and the ftp.archlinux.org rate-limiting seems to work perfectly... So why try reinventing the wheel? :) Cheers, ~p