By default, OpenVPN uses UDP port 1194, but it can be run over TCP port 443 to emulate regular HTTPS traffic. This trick can be effective at disguising OpenVPN traffic in a number of situations – but it won't fool more advanced deep packet inspection (DPI) techniques. In order to use TCP port 443 in OpenVPN, it must be configured both client-side and server-side, but most VPN providers do support TCP port 443 server-side. Chances are that your provider offers the OpenVPN config file (.ovpn) pre-configured for TCP port 443, but if it doesn't, then you can create them yourself. Edit the .ovpn file you want to use in any text editor, remove any existing settings, and add the lines: remote server.address.com 443 proto tcp Then save. If in doubt, contact your VPN provider for advice, as it is possible that it uses custom settings or that not all its servers support OpenVPN over TCP port 443