Selfhosted
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
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I think opening a tunnel and forwarding the port through it and opening a port forward directly have about the same security implications. Both end up opening the same port and forwarding the same packets to the same computer. The only difference is with a tunnel there is an extra step in between that slows things down. In some edge cases it may be nice if people can't directly see your IP but just the one from the tunnel. But that doesn't matter if it's only for you and your friends. Might be a concern though if you're a big live-streamer and fear people DDoSing you. But then there are better alternatives. (for example paying $8 a month for a small VPS.) So I think a tunnel makes perfect sense if you can't get the port forward running. It just doesn't add anything to security.
Cloudflare might be a different deal though. They include DDoS protection and filter some attacks. I don't like cloudflare so I don't really know the specifics. I think it's bad for the internet that a good share of the overall traffic is tunneled over a single company's servers. And I myself don't need a middleman in my own services. But they certainly must have something to offer or they wouldn't be as popular as they are...