Ok i managed to get it working via ipv6 tunnel. (tunnelbroker)
For ubuntu 18, use this script (with your tunnelbroker data)
$ nmcli connection add
type ip-tunnel ifname he-sit
mode sit remote 216.66.86.114 –
ipv4.method disabled ipv6.method manual
ipv6.address 2001:470:6c:dd3::2/64
ipv6.gateway 2001:470:6c:dd3::1