Twin directories of rfc:

[DIR]  ftp://ftp.fgan.de/pub/rfc/
[DIR]  ftp://ftp.tm.informatik.uni-frankfurt.de/pub/doc/rfc/
[DIR]  ftp://ftp.cs.rutgers.edu/rfc/
[DIR]  ftp://ftp.tcp.co.uk/pub/reference/rfc/
[DIR]  ftp://ftp.mimuw.edu.pl/People/kedar/SIK2006/cw14-mail/rfc/
[DIR]  ftp://ftp.kemsu.ru/pub/Software/Unix/mail/rfc/
[DIR]  ftp://ftp.udel.edu/pub/internet/rfc/
[DIR]  ftp://ftp.udel.edu/pub/people/mills/rfc/
[DIR]  ftp://82.96.64.7/pub/linux/kernel/people/christoph/patch-archive/2008/slab_reclaim/rfc/
[DIR]  ftp://82.96.64.7/pub/linux/kernel/people/christoph/patch-archive/2008/cpuset_dirty/rfc/
[DIR]  ftp://82.96.64.7/pub/linux/kernel/people/christoph/patch-archive/2008/largeblock/vcp/rfc/
[DIR]  ftp://82.96.64.7/pub/linux/kernel/people/christoph/patch-archive/2008/largeblock/rfc/
[DIR]  ftp://82.96.64.7/pub/linux/kernel/people/christoph/patch-archive/2008/memless/rfc/
[DIR]  ftp://82.96.64.7/pub/linux/kernel/people/christoph/patch-archive/2008/mlock/rfc/
[DIR]  ftp://82.96.64.7/pub/linux/kernel/people/christoph/patch-archive/2008/mmu/mmu_not/rfc/
[DIR]  ftp://82.96.64.7/pub/linux/kernel/people/christoph/patch-archive/2008/pageflags/rfc/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.ripe.net/rfc/
[DIR]  ftp://ftp.eenet.ee/doc/rfc/
[DIR]  ftp://ftp.eenet.ee/arhiiv/radius/rfc/
[DIR]  ftp://ftp.pepperdine.edu/pub/rfc/
[DIR]  ftp://ftp.cpsc.ucalgary.ca/pub/rfc/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/kernel.org/pub/kernel/people/christoph/patch-archive/2008/cpuset_dirty/rfc/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/kernel.org/pub/kernel/people/christoph/patch-archive/2008/largeblock/vcp/rfc/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/kernel.org/pub/kernel/people/christoph/patch-archive/2008/largeblock/rfc/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/kernel.org/pub/kernel/people/christoph/patch-archive/2008/memless/rfc/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/kernel.org/pub/kernel/people/christoph/patch-archive/2008/mlock/rfc/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/kernel.org/pub/kernel/people/christoph/patch-archive/2008/mmu/mmu_not/rfc/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/kernel.org/pub/kernel/people/christoph/patch-archive/2008/pageflags/rfc/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/kernel.org/pub/kernel/people/christoph/patch-archive/2008/slab_reclaim/rfc/
[DIR]  ftp://ftp.fi.upm.es/pub/docs/rfc/rfc/
[DIR]  ftp://ftp.fi.upm.es/pub/docs/rfc/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/ietf/rfc/rfc/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/ietf/rfc/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors2/ftp.kernel.org/pub/linux/kernel/people/christoph/patch-archive/2008/slab_reclaim/rfc/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors2/ftp.kernel.org/pub/linux/kernel/people/christoph/patch-archive/2008/cpuset_dirty/rfc/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors2/ftp.kernel.org/pub/linux/kernel/people/christoph/patch-archive/2008/largeblock/vcp/rfc/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors2/ftp.kernel.org/pub/linux/kernel/people/christoph/patch-archive/2008/largeblock/rfc/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors2/ftp.kernel.org/pub/linux/kernel/people/christoph/patch-archive/2008/memless/rfc/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors2/ftp.kernel.org/pub/linux/kernel/people/christoph/patch-archive/2008/mlock/rfc/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors2/ftp.kernel.org/pub/linux/kernel/people/christoph/patch-archive/2008/mmu/mmu_not/rfc/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors2/ftp.kernel.org/pub/linux/kernel/people/christoph/patch-archive/2008/pageflags/rfc/
[DIR]  ftp://ftp.vernet.lv/pub/Nets/rfc/
[DIR]  ftp://debian.lcs.mit.edu/pub/linux/kernel/people/christoph/patch-archive/2008/cpuset_dirty/rfc/
[DIR]  ftp://debian.lcs.mit.edu/pub/linux/kernel/people/christoph/patch-archive/2008/largeblock/vcp/rfc/
[DIR]  ftp://debian.lcs.mit.edu/pub/linux/kernel/people/christoph/patch-archive/2008/largeblock/rfc/
[DIR]  ftp://debian.lcs.mit.edu/pub/linux/kernel/people/christoph/patch-archive/2008/memless/rfc/
[DIR]  ftp://debian.lcs.mit.edu/pub/linux/kernel/people/christoph/patch-archive/2008/mlock/rfc/
[DIR]  ftp://debian.lcs.mit.edu/pub/linux/kernel/people/christoph/patch-archive/2008/mmu/mmu_not/rfc/
[DIR]  ftp://debian.lcs.mit.edu/pub/linux/kernel/people/christoph/patch-archive/2008/pageflags/rfc/
[DIR]  ftp://debian.lcs.mit.edu/pub/linux/kernel/people/christoph/patch-archive/2008/slab_reclaim/rfc/