VPN — OpenVPN — Configuring a Single Multi-Purpose OpenVPN
Apr 06, 2020 Explanation: connect using TCP 443 | OVPN.com The OVPN client has a functionality called Connect using TCP 443, which means that the connection to our servers will use TCP as the protocol and 443 as the port number.The default setting is UDP and port 1194. However, this setting only takes effect when connecting using the standard service. OpenVPN TCP 443 - Server Fault
Port 443 (tcp/udp) :: SpeedGuide
SSL VPN over UDP still attempts to connect to the VPN server on port 443, but unlike HTTPS traffic that uses TCP as a transport protocol, it uses UDP. Some firewalls and proxies may flag this as suspicious and drop the traffic.
OpenVPN constantly resetting connection when run in TCP
What ports are used by your VPN service? - Knowledgebase In order to connect to our service using one of the VPN methods we provide, please verify you can connect over these ports: For Our Stable Client: UDP ports 1194, 8080, 9201 and 53; TCP ports 443, 110, and 80; For OpenVPN: UDP ports 1194, 1197, 1198, 8080, 9201 and 53 ; TCP ports 502, 501, 443, 110, and 80; L2TP uses: UDP ports 500, 1701, and Testing Sophos SSL VPN Performance - UDP or TCP? SSL VPN over UDP still attempts to connect to the VPN server on port 443, but unlike HTTPS traffic that uses TCP as a transport protocol, it uses UDP. Some firewalls and proxies may flag this as suspicious and drop the traffic.