Due to having to expose local developments (in progress) publicly to interact with other third party services or to show them to other programmers I usually use ngrok in the free tier… Which is an absolute mess because it changes the URL on each command (nevertheless it works out of the box and very fast)…
I have also tried Localtunnel which it’s great but hangs a lot. Anybody knows any self-hosted solution that giving a domain of my own can I expose via tunnels in subdomains?
Why not just let your local server through the firewall? Alternatively, I’ve used ssh -R for something like this before.