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Who's running gopher on IPv6?!
April 10th, 2018
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Using some (not so creative) command line tools, I have come up with a
partial list of gopher servers that use IPv6... As a starting point I
used Cameron Kaiser's list of new gopher servers since 1999 (which only
has stable servers with DNS, hence the list being partial), and then
ran an nslookup for AAAA records...

The commands I used went something like this:
curl -s gopher://gopher.floodgap.com:70/1/new | sed 's/,/XXX/' | \
tr "\\t" "," | dos2unix | grep '^1' | awk -F, '{print $3}' | \
sed '/^\s*$/d' | grep --color=never -E '(.*\.){1}' | sort | uniq > \
gopher.servers.txt

nslookup << EOF > gopher.AAAA.txt
set querytype=AAAA
$(cat gopher.servers.txt)
exit
EOF

I could easily have done this with more portable commands and condensed
them down to use less total commands, but I was in a hurry. :)

BTW, the gopher RFC says to use FQDN only for the hostname portion of
a gopher resource, so the bare IP lines below probably wont work:

=> Name: 661.org | Address: 2600:3c01::f03c:91ff:fe1f:a30d

=> Name: devio.us | Address: 2001:470:4:2a5::feed:dead

=> Name: fribyte.uib.no | Address: 2001:700:201:1::7016

=> Name: ftp.icm.edu.pl | Address: 2001:6a0:0:31::2

=> gopher.4d2.org canonical name = cosmo.4d2.org. | Name: cosmo.4d2.org | Address: 2600:3c00::f03c:91ff:fedb:fa7c

=> Name: gopher.johncave.co.nz | Address: 2001:19f0:6000:9103:5400:ff:fe0c:65d5

=> gopher.meulie.net canonical name = de3.meulie.net. | Name: de3.meulie.net | Address: 2a01:4f8:191:63af::2

=> Name: gopher.r-36.net | Address: 2a01:4f8:160:43cd::3

=> gopher.umbrellix.net canonical name = www.umbrellix.net. | Name: www.umbrellix.net | Address: 2001:19f0:8001:279:5400:ff:fe69:2b87

=> Name: gopher.wensley.org.uk | Address: 2001:8b0:1e4::

=> Name: telefisk.org | Address: 2a02:980:2a43:a400:bed:c0ff:ee:160

=> Name: tilde.land | Address: 2001:4801:7821:77:be76:4eff:fe11:e05

=> Name: umaxx.net | Address: 2a01:238:424b:de00:cef6:8658:1611:5807

=> Name: uninformativ.de | Address: 2a03:4000:5:313:aec2:3146:f481:13f6

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