Install sslh by entering the following commands in the terminal:
sudo apt update sudo apt install sslh
Description:
Applicative protocol multiplexer
sslh lets one accept HTTPS, SSH, OpenVPN, tinc and XMPP connections on the same port. This makes it possible to connect to any of these servers on port 443 (e.g. from inside a corporate firewall, which almost never block port 443) while still serving HTTPS on that port.
Homepage: http://www.rutschle.net/tech/sslh.shtml
Version: 1.18-1
Section: universe/net