I have no idea where to report but the ipv6 stack of packages.x2go.org does not reply:
$ host packages.x2go.org packages.x2go.org is an alias for ymir.das-netzwerkteam.de. ymir.das-netzwerkteam.de has address 148.251.201.107 ymir.das-netzwerkteam.de has IPv6 address 2a01:4f8:202:1381::107
$ telnet packages.x2go.org 80 Trying 2a01:4f8:202:1381::107... ^C
$ telnet -4 packages.x2go.org 80 Trying 148.251.201.107... Connected to ymir.das-netzwerkteam.de. Escape character is '^]'. ^] telnet> q Connection closed.
R.
-- richard lucassen http://contact.xaq.nl/