Since my ISP has switched to IPv6 I am not able to connect to the OpenVPN sever provided by TO any more.
I have used the plugin to generate the server for me. Then I have changed the proto option to udp6 for both server and client, but apparently this is not enough.
In /var/log/messages I see only these errors related to openvpn:
2017-09-23T19:06:24+02:00 err openvpn(server_turris)[18433]: some:long:ipv6:address TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
2017-09-23T19:06:24+02:00 err openvpn(server_turris)[18433]: some:long:ipv6:address TLS Error: TLS handshake failed
2017-09-23T19:06:24+02:00 notice openvpn(server_turris)[18433]: some:long:ipv6:address SIGUSR1[soft,tls-error] received, client-instance restarting
Any hints how to make the connection via IPv6 work?
Also any changes to the Router address in Foris are ignored, so I have to edit the client config manually 