ftp://ftp.dk.net/mirrors/ftp.ripe.net/mirrors/  direct

[DIR]sites/  direct  470+ twin directories
[DIR]iab/  direct  119 twin directories
[DIR]ietf/  direct  78 twin directories
[DIR]tools/  direct  1000+ twin directories
[DIR]iesg/  direct  22 twin directories
[DIR]internet-drafts/  direct  155 twin directories