ftp.tw.freebsd.org is an alias for freebsd.csie.nctu.edu.tw.
ftp1.tw.freebsd.org is an alias for freebsd.ntcu.net.
ftp2.tw.freebsd.org is an alias for freebsd.nsysu.edu.tw.
ftp3.tw.freebsd.org is an alias for ccuftp.ccu.edu.tw.
ftp4.tw.freebsd.org is an alias for ftp.ee.ncku.edu.tw.
ftp5.tw.freebsd.org is an alias for freebsd.ntcu.net.
ftp6.tw.freebsd.org is an alias for bsd.cc.ntu.edu.tw.
ftp7.tw.freebsd.org is an alias for ftp.NHCTC.edu.tw.
ftp8.tw.freebsd.org is an alias for ftp.tku.edu.tw.
ftp9.tw.freebsd.org is an alias for ftp.chu.edu.tw.
ftp10.tw.freebsd.org is an alias for freebsd.ntcu.net.
ftp11.tw.freebsd.org is an alias for mirror.csie.ntu.edu.tw.
ftp12.tw.freebsd.org is an alias for freebsd.ndhu.edu.tw.
ftp13.tw.freebsd.org is an alias for freebsd.cis.nctu.edu.tw.
ftp14.tw.freebsd.org is an alias for FreeBSD.nccu.edu.tw.
ftp15.tw.freebsd.org is an alias for freebsd.giga.net.tw.
for make.conf
MASTER_SITE_OVERRIDE?= \
ftp://freebsd.csie.nctu.edu.tw/pub/distfiles/${DIST_SUBDIR} \
ftp://ftp1.tw.freebsd.org/pub/distfiles/${DIST_SUBDIR} \
ftp://ftp2.tw.freebsd.org/pub/FreeBSD/distfiles/${DIST_SUBDIR} \
ftp://ftp3.tw.freebsd.org/pub/distfiles/${DIST_SUBDIR} \
ftp://ftp6.tw.freebsd.org/pub/distfiles/${DIST_SUBDIR} \
ftp://ftp7.tw.freebsd.org/pub/distfiles/${DIST_SUBDIR} \
ftp://ftp8.tw.freebsd.org/pub/FreeBSD/distfiles/${DIST_SUBDIR} \
ftp://ftp9.tw.freebsd.org/FreeBSD/distfiles/${DIST_SUBDIR} \
ftp://ftp11.tw.freebsd.org/pub/FreeBSD/distfiles/${DIST_SUBDIR} \
ftp://ftp13.tw.freebsd.org/pub/FreeBSD/distfiles/${DIST_SUBDIR} \
ftp://ftp14.tw.freebsd.org/distfiles/${DIST_SUBDIR} \
ftp://ftp15.tw.freebsd.org/pub/FreeBSD/distfiles/${DIST_SUBDIR} \
# 1,5,10 same, ftp4 down, ftp12 no distfiles