If you're buying a VPS why not host the website there?

I know 4g is not fast, but I would like to use it

There was a time when people used to have 2400 bits per second from home (for the youngsters: that is 0.0003M). So if you are doing it for fun, why not.

Have you looked into Cloudflare Tunnel? It's a turnkey solution that does exactly what you want. No idea what the cost is though.

I'm using Headscale for something similar. I have a VPS and a server at home. Both are on the same Headscale network. On the home server I set up a Matrix server. On the VPS I set up Caddy as a reverse proxy for the home server with its Headscale IP. It works nicely.

I'm not on 4G, though.

I mean I think it really depends on the type of website you're trying to host. A static blog would use way less bandwidth than a media server for example. Traffic would have the same effect too, where 1 concurrent visitor to a blog would probably be fine but 10,000 would be a problem.

You're on the right track. As long as wiregurd on the VPS will allow an incoming connection from you home 4g, which will probably be CGNAT, it'll work. Did you look into running the NGINX reverse on the VPS? I like terminating external stuff on cloud side, then only bring filtered or desired traffic over the tunnel.

I doubt this will be any use, but my Telstra 4G has a public IPv6.

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

3 acronyms in this thread; the most compressed thread commented on today has 5 acronyms.

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If you’re hosting websites and not applications, perhaps you can use SSGs like Hugo/Gatsby. You could deploy your site in a bucket and put cloudflare in front. They can also be used on your own server of course. If you are hosting applications and want to keep them on 4g, you could put a CDN (CloudFlare or …) in frint of it. That would cache all static resources and greatly improve response times.

If you’re hosting websites and not applications, perhaps you can use SSGs like Hugo/Gatsby. You could deploy your site in a bucket and put cloudflare in front. They can also be used on your own server of course. If you are hosting applications and want to keep them on 4g, you could put a CDN (CloudFlare or …) in frint of it. That would cache all static resources and greatly improve response times.

Sounds like a connection would work with that setup but it would depend on what you are planning on hosting. Anything that is sensitive to latency would probably not work well. Static sites should be fine though.