XPOS is a free and open-source tool that allows local servers to be accessible on the public internet. It supports any TCP protocols like HTTP, SSH, and more.
curl -fsSL https://xpos-it.com/install.sh | sudo bash
Request an authentication token from https://xpos-it.com/auth and run:
xpos auth <auth-token>
Expose your local server on port 3000:
xpos http 3000
Expose an SSH server on port 22:
xpos tcp 22