ftp://ftp.uni-frankfurt.de/pub/Mirrors3/debian.org/debian-security/dists/  direct

[DIR]lenny/  direct  702+ twin directories
[DIR]etch/  direct  994+ twin directories
[DIR]squeeze/  direct  1077+ twin directories
5 B  2009-02-13stable  665+ mirrors
7 B  2009-02-13testing  313+ mirrors
4 B  2009-02-13oldstable  369+ mirrors