Twin directories of 4x:

[DIR]  ftp://ftp.up.pt/pub/scientific/4x/
[DIR]  ftp://ftp.msiu.ru/pub/mirrors/ftp.scientificlinux.org/linux/scientific/4x/
[DIR]  ftp://ftp.oce.orst.edu/pub/steve/Dave/4x/
[DIR]  ftp://ftp.phys.ttu.edu/pub/SL/4x/
[DIR]  ftp://moonhe.jinr.ru/pub/bsd/packages.local.elf/4x/
[DIR]  ftp://ftp.botik.ru/pub/kaspersky/ftp.kaspersky.ru/updates/PartnerRus/archive/english/businessoptimal/email_gateways/kavsendmailqmailpostfixexim4/4x/
[DIR]  ftp://ftp.botik.ru/pub/kaspersky/ftp.kaspersky.ru/updates/PartnerRus/archive/russian/businessoptimal/email_gateways/kavsendmailqmailpostfixexim4/4x/
[DIR]  ftp://ftp.botik.ru/pub/kaspersky/ftp.kaspersky.ru/updates/partners/archive/english/businessoptimal/email_gateways/kavsendmailqmailpostfixexim4.5/4x/
[DIR]  ftp://ftp.relans.ru/ucfp/distr/freebsd/4x/
[DIR]  ftp://ftp.uni-jena.de/pub/linux/MIRROR.scientific/4x/
[DIR]  ftp://ftp.relans.ru/ucfp/kav4ucfp/freebsd/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/4x/
[DIR]  ftp://ftp.scientificlinux.org/test/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/.snapshot/NDMP_AUTO_SNAPSHOT1535/linux/scientific/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/44/x86_64/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/44/i386/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/42/x86_64/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/42/i386/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/.snapshot/NDMP_AUTO_SNAPSHOT1531/linux/scientific/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/.snapshot/NDMP_AUTO_SNAPSHOT1937/linux/scientific/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/41/i386/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/.snapshot/NDMP_AUTO_SNAPSHOT1514/linux/scientific/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/extra/linux-ink/4x/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/.snapshot/NDMP_AUTO_SNAPSHOT1933/linux/scientific/4x/
[DIR]  ftp://ftp.nodak.edu/pub/mirror/linux/scientific/4x/
[DIR]  ftp://ftp.sara.nl/pub/scientific_linux/4x/
[DIR]  ftp://ftp.gazi.edu.tr/pub/Linux/ScientificLinux/x86_64/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.gazi.edu.tr/pub/Linux/ScientificLinux/i386/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.tu-chemnitz.de/.SAN0/pub/linux/scientific/4x/
[DIR]  ftp://ftp.tu-chemnitz.de/.SAN0/pub/linux/scientific/44/x86_64/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.tu-chemnitz.de/.SAN0/pub/linux/scientific/44/i386/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.tu-chemnitz.de/.SAN0/pub/linux/scientific/42/x86_64/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.tu-chemnitz.de/.SAN0/pub/linux/scientific/42/i386/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.tu-chemnitz.de/.SAN0/pub/linux/scientific/41/i386/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.ticklers.org/pub/OpenBSD/distfiles/by_cipher/sha256/4x/
[DIR]  ftp://ftp.ticklers.org/pub/OpenBSD/distfiles/by_cipher/md5/4x/
[DIR]  ftp://ftp.ticklers.org/pub/OpenBSD/distfiles/by_cipher/rmd160/4x/
[DIR]  ftp://ftp.ticklers.org/pub/OpenBSD/distfiles/by_cipher/sha1/4x/
[DIR]  ftp://download.intel.com/support/teamstation/4x/
[DIR]  ftp://ftp.in2p3.fr/pub/linux/scientific/4x/
[DIR]  ftp://ftp.twaren.net/pub/Linux/Scientific/4x/
[DIR]  ftp://ftp.twaren.net/pub/Linux/Scientific/44/i386/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.twaren.net/pub/Linux/Scientific/44/x86_64/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.twaren.net/pub/Linux/Scientific/42/x86_64/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.twaren.net/pub/Linux/Scientific/42/i386/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.twaren.net/pub/Linux/Scientific/41/i386/sites/Fermi/contrib/RPMS/4x/
[DIR]  ftp://ftp.au.freebsd.org/disks/la1/.p/scientific/4x/
[DIR]  ftp://ftp.lip6.fr/pub/linux/distributions/scientific/4x/
[DIR]  ftp://virtualhosts.botik.ru/pub/kaspersky/ftp.kaspersky.ru/updates/partners/archive/english/businessoptimal/email_gateways/kavsendmailqmailpostfixexim4.5/4x/
[DIR]  ftp://virtualhosts.botik.ru/pub/kaspersky/ftp.kaspersky.ru/updates/PartnerRus/archive/russian/businessoptimal/email_gateways/kavsendmailqmailpostfixexim4/4x/