Warning, this article has been created more than 6 month ago. The information it contains may not be up to date. Specific OpenVPN error on Windows 10 "endpoints must exist within the same 255.255.255.252" Written by Mirabellette / 15 may 2017 / no comments Hello everyone, system debian jessie stable 8.7 windows 10 creators update openvpn 18.104.22.168 on the server openvpn 2.4.2 on the client I recently got a new laptop with windows 10. Obviously, I installed OpenVPN with the correct configuration. When I try to connect it i got an error's message. if The local and remote VPN endpoints must exist within the same 255.255.255.252 After some hours to find a solution, I finally find it and it is trivial. You just have to open your open vpn configuration add "topology subnet" restart openvpn vim /etc/openvpn/server.conf add "topology subnet" service openvpn restart * on the client service openvpn restart Now, the openvpn client must be able to connect to the server without error. I hope this article will help you to solve this kind of problem.