I'm trying to set up an OpenVPN client on a Miktrotik to connect to a Linux server. It seems that every aspect of a normal configuration is somehow wrong in the eyes of the Mikrotik. UDP is wrong, client certs are wrong, shared passwords are good, compression is bad.

So I'm playing along, I changed the server to tcp, I wrote a password authentication system, I disabled LZO.

Now the Mikrotik is connecting, but it immediately disconnects:

terminating... - no ip address provided

I'm using mode=ethernet, with the intention of adding the interface to a bridge. Why would an IP be required? That makes no sense. It's layer 2.

Is there a way around this?

I have nothing against mikrotik but I would advise you stay away from teh openvpn server. I have it deployed with 10 users and I have to reboot the routerboard every 28 days or so because openvpn just stops working. I have seen this a couple of times with other deployments as well so I know it's not an isolated indecent.