I have an Asus RT-AC66U router with an openvpn server which I've connected to successfully numerous times on Windows using the openvpn client. I want to set up a client on Ubuntu 16.04. To do this I've followed instructions from other questions like: How can I use a .ovpn file with Network Manager? (They all seem to say pretty much the same thing.) But when I try to connect I get a pop up message of:
The IP config of the VPN connection was invalid.
And when I look at my router's system log there is a single error saying
openvpn: client/xxx.xxx.xxx.xxx:xxxxx MULTI: no dynamic or static remote --ifconfig address is available for client/xxx.xxx.xxx.xxx:xxxxx
I get the feeling like this is an either an iptables or a dns problem but I can't find any help suitable for this issue. Does anyone have any suggestions?