Twin directories of debian-security:

[DIR]  ftp://128.31.0.36/debian-security/
[DIR]  ftp://ftp.cesca.es/mirror/debian-security/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors3/debian.org/debian-security/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/debian-security/
[DIR]  ftp://ftp.nz.debian.org/debian-security/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/linux/debian-mirror/debian-security/
[DIR]  ftp://ftp.wh2.tu-dresden.de/pub/mirrors/debian-security/
[DIR]  ftp://ftp.mgts.by/pub/debian-security/
[DIR]  ftp://ftp.uni-kassel.de/Mirrors1/ftp.de.debian.org/debian-security/
[DIR]  ftp://24.215.0.24/Debian/debian-security/
[DIR]  ftp://ftp.rd.cri74.org/debian-security/
[DIR]  ftp://ftp.rfc822.org/pub/mirror/security.debian.org/debian-security/
[DIR]  ftp://ftp.lf.net/pub/Mirrors/ftp.debian.org/debian-security/
[DIR]  ftp://sapi.vlsm.org/.1/debian-security/
[DIR]  ftp://ftp.cl.debian.org/debian-security/
[DIR]  ftp://64.15.134.18/debian-security/
[DIR]  ftp://ftp.ankara.edu.tr/debian-security/
[DIR]  ftp://ftp.ath.cena.fr/debian-security/
[DIR]  ftp://ftp.zcu.cz/pub/linux/debian-security/
[DIR]  ftp://ftp.sci.usq.edu.au/pub/debian/debian-security/
[DIR]  ftp://ftp.tu-ilmenau.de/Mirrors/security.debian.org/debian-security/
[DIR]  ftp://ftp.uwa.edu.au/mirrors/linux/debian-security/
[DIR]  ftp://ftp.med.univ-tours.fr/debian-security/
[DIR]  ftp://ftp.psn.ru/pub/Linux/debian-security/
[DIR]  ftp://ftp.school.ioffe.ru/pub/mirrors/debian-security/
[DIR]  ftp://ftp.song.fi/pub/mirrors/debian-security/
[DIR]  ftp://ftp.song.fi/debian-security/
[DIR]  ftp://ftp.tiscali.nl/pub/mirror/debian-security/
[DIR]  ftp://ftp.demon.nl/disk3/debian-security/
[DIR]  ftp://ftp.fh-giessen.de/pub/linux/debian-security/
[DIR]  ftp://ftp.debian.de/debian-security/
[DIR]  ftp://77.88.19.68/debian-security/
[DIR]  ftp://200.17.202.1/debian-dists/debian-security/
[DIR]  ftp://ftp.uni-augsburg.de/mirrors/debian/ftp.de.debian.org/debian-security/
[DIR]  ftp://200.17.202.16/debian-dists/debian-security/
[DIR]  ftp://ftp.de.netclusive.de/pub/Linux/debian-security/
[DIR]  ftp://quatramaran.ens.fr/pub/Debian/debian-security/
[DIR]  ftp://130.89.149.225/debian-security/
[DIR]  ftp://83.166.201.99/debian-security/
[DIR]  ftp://ftp.nz.kernel.org/pub/debian-security/
[DIR]  ftp://ftp.crans.org/pub/debian-security/
[DIR]  ftp://ftp.li.kernel.org/pub/.3/ftp.debian.org/pub/debian-security/
[DIR]  ftp://ftp.uni-kl.de/pub/linux/debian-security/
[DIR]  ftp://ftp.ula.ve/linux/distribuciones/debian-security/
[DIR]  ftp://ftp.uni-klu.ac.at/linux/debian-security/
[DIR]  ftp://galatea.rotfl.eu.org/mirror/security.debian.org/debian-security/
[DIR]  ftp://128.237.157.9/archive.debian.org/debian-security/
[DIR]  ftp://ftp.usc.es/pub2/debian-security/
[DIR]  ftp://ftp.hk.debian.org/debian-security/mirror/security.debian.org/debian-security/
[DIR]  ftp://ftp.hk.debian.org/debian-security/skel/security.debian.org/debian-security/