I have been developing for my own use something like that but self hosted. There are other solutions, but this one simple, reliable and secure in a way I see it.

Originally didn't want to share but here it is https://github.com/reddec/tunnel-me

UI: fully LLM assisted (not vibe coded, but guided with a lot of iterations). Backend: hand written, but before release polished via LLM. Docs: me - input, LLM - output.

The things I am proud:

- it very reliable

- its single binary with reasonable defaults and low memory usage

- SSO out of the box (cause I am using pocketid in my homelab)

- very simple backend