Twin directories of slip:

[DIR]  ftp://ftp.uni-freiburg.de/pub/pc/win95/slip/
[DIR]  ftp://ftp.ipswitch.com/ipswitch/Product_Support/Piper/slip/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/gnu/tmp/linux-libre-fsf2_2.6.28/linux-2.6.28/debian/linux-headers-2.6.28-libre-fsf2/usr/src/linux-headers-2.6.28-l/slip/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/gnu/tmp/linux-libre-fsf2_2.6.28/linux-2.6.28/include/config/slip/
[DIR]  ftp://ftp.wu-wien.ac.at/wuw/infocenter/modem/slip/
[DIR]  ftp://ftp.wu-wien.ac.at/pub/systems/pc/junk/slip/
[DIR]  ftp://ftp.uni-koeln.de/net/slip/
[DIR]  ftp://ftp.fhg.de/archive/gmd/slip/
[DIR]  ftp://ftp.caspur.it/pub/windows/slip/
[DIR]  ftp://ftp.lf.net/pub/comm/slip/
[DIR]  ftp://ftp.lf.net/pub/mac/comm/slip/
[DIR]  ftp://ftp.lf.net/pub/unix/comm/slip/
[DIR]  ftp://ftp.databeast.com/pub/light/mac/slip/
[DIR]  ftp://ftp.peak.org/pub/next-ftp/next/demos/comm/slip/
[DIR]  ftp://ftp.thomsongrassvalley.com/router/sms7000/slip/
[DIR]  ftp://ftp.technion.ac.il/pub/supported/pc/comm/slip/
pkg://aaa_base.tgz:508742/etc/  downloads[DIR]3  aaa_base.tgz/etc/slip/
[DIR]  ftp://ftp.sfu.ca/pub/mac/slip/
[DIR]  ftp://ftp.sfu.ca/pub/pc/slip/
[DIR]  ftp://ftp.botik.ru/pub/doc/books/nag/TheGuide/slip/
[DIR]  ftp://ftp.rdrop.com/pub/dos/slip/
[DIR]  ftp://ftp.starhub.net.sg/pub/funet/unix/networking/slip/
[DIR]  ftp://ftp.icyb.net.ua/pub/icyb/services/online/scripts/slip/
[DIR]  ftp://ftp.demon.nl/disk3/Demon/mac/internet/slip/
[DIR]  ftp://ftp.demon.nl/disk3/Demon/os2/slip/
[DIR]  ftp://ftp.kuzbass.ru/pub/unix/networks/slip/
[DIR]  ftp://ftp.kuzbass.ru/pub/networks/tcpip/slip/
[DIR]  ftp://147.52.159.12/networking/slip/
[DIR]  ftp://ftp.nstu.ru/pub/sources/nettools/slip/
[DIR]  ftp://ftp.padua.org/pub/net/slip/
[DIR]  ftp://ftp.ibr.cs.tu-bs.de/networking/slip/
[DIR]  ftp://ftp.scn.rain.com/pub/network/slip/
pkg://dsmidiwifi-1.01a-2.fc9.i386.rpm:29729/  info  downloads[DIR]3  dsmidiwifi-1.01a-2.fc9.i386.rpm/slip/
[DIR]  ftp://sunsite.mff.cuni.cz/MIRRORS/ftp.funet.fi/pub/unix/networking/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/44/x86_64/sites/Fermi/contrib/RPMS/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/44/i386/sites/Fermi/contrib/RPMS/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/44/i386/sites/Fermi/contrib/SRPMS/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/42/x86_64/sites/Fermi/contrib/RPMS/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/42/x86_64/sites/Fermi/contrib/SRPMS/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/42/i386/sites/Fermi/contrib/RPMS/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/42/i386/sites/Fermi/contrib/SRPMS/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/41/i386/sites/Fermi/contrib/RPMS/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/scientific/41/i386/sites/Fermi/contrib/SRPMS/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/fermi/lts4rolling/testing/i386/RPMS.old/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/fermi/lts4rolling/testing/i386/SRPMS/old/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/fermi/lts4rolling/testing/x86_64/RPMS.old/slip/
[DIR]  ftp://ftp.scientificlinux.org/disk/disk4/linux/fermi/lts30rolling/testing/i386/SRPMS/slip/
[DIR]  ftp://ftp.rhrz.uni-bonn.de/pub-koeln/net/slip/
[DIR]  ftp://ftp.csie.nctu.edu.tw/pub/Unix/networking/serial-ip/slip/
[DIR]  ftp://ftp.ptb.de/pub/slip/