Backup via R1soft
as someone might have already heard we mostly use r1soft for server backup combined with mount10 backup for files.
unfortunately recently i was not able to actually install the backup driver. All that comes with r1soft-setup --get-module
is an error ending with ssl connect error
Solution
It happens if you only have IPv6 DNS Servers in /etc/resolv.conf. Just add an IPv4 DNS to the list and it works. Stupid script.