Plenty of alternatives exist - https://github.com/anderspitman/awesome-tunneling https://github.com/anderspitman/awesome-tunneling. My issue with Funnel is that

Plenty of alternatives exist - https://github.com/anderspitman/awesome-tunneling https://github.com/anderspitman/awesome-tunneling. My issue with Funnel is that it includes no auth, exposing you to anyone in the world. I will advocate for zrok.io as I work on its parent project, OpenZiti. zrok is open source and has a free SaaS (as well as auth and hardening in general).