I have 2 openvpn running on 2 seperate vps. what i want is someone who can make database type authentication (ldap, mysql) and centralize the authentication method for the 2 vpn. example is you make a username and password in vpn#1 and that newly created login should also work with vpn#2. to make it short, multi-server vpn. please tell me what kind of method you're going to use and how much you're charging for.