Nov 08, 2019

Port Checker is a simple and free online tool for checking open ports on your computer/device, often useful in testing port forwarding settings on a router. For instance, if you're facing connection issues with a program (email, IM client etc) then it may be possible that the port required by the application is getting blocked by your router's OpenVPN connection to port 443 is being dropped by network Apr 18, 2019 whitelisting url on port 443 - Microsoft Community

Question of using a VPN with SSL port 443. : VPN

VPN is essentially IPSec, and is established on layer 3. TCP, UDP and all other transport protocols are running transparently over VPN. OpenVPN is the actual tunnel, connecting the user's VPN to the VPN server in another country. OpenVPN relies on 256-bit Open SSL encryption to secure your data, which is military-grade encryption. I have an issue where port 443 is setup on a Cisco ASA appliance for AnyConnect and WebVPN. 1. I get a timeout when trying to go there via browser or AnyConnect client. 2. If I change to a different public interface on the ASA on port 443, it works. 3. If I change from port 443 to a different port (tried 8443), it works. 4. My vpn allows me to use TCP 443. I heard that using VPN through port 443 is more secure. If I use VPN on port 443 it means that vpn tunnel will run through port 443 and the traffic would appear as if it is SSL traffic. Can I use vpn on TCP port 443 and at the same time use SSL version of the website?

You can try SoftEther, they have their own SSL VPN protocol that's nice but it only works on computers, but if you want to use your phone they incorporate OpenVPN and SSTP (microsoft's SSL VPN). Or you can use openconnect/ocserv which uses the Cisco Anyconnect protocol, it's a pain to set up but very reliable.

This is a list of TCP and UDP port numbers used by protocols of the Internet protocol suite for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) needed only one port for full-duplex, bidirectional traffic. I run OpenVPN at 443 for my use as well, but the default will always be 1194 which is the officially-assigned-by-the-IANA OpenVPN port number (see IANA port list and Wikipedia port list). I doubt pfSense will change the default from the officially-assigned port any time soon.