Question about traffic using Cloudflare tunnel (sh.itjust.works)

submitted 2 days ago by [email protected] to c/[email protected]

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Let's say I setup some subdomains and then point them to my home server via Cloudflare tunnel.

If I use one of those subdomains from my personal PC on the same network as my home server, to watch a movie for example, is all of that traffic going out to the internet and then back? Or does all the traffic stay internal once the connection has been made?

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[-] [email protected] 2 points 2 days ago

Remember that we're talking about a server on your local network, and a device on the local network to make the connection for the stream. We aren't talking about streaming over the internet.

Client looks up server via DNS
Client connects to public IP
Client handshakes to server
Server announces to client available connections (public, local)
Client continues connections with local address

There is no need for tailscale or anything, this is a local connection. The only thing the public address is doing is the initial call to the server.

[-] [email protected] 3 points 2 days ago

I get how that could work, but what services actually do that? Homeassistant can, but that needs to be setup explicitly for it to work.

[-] [email protected] 2 points 2 days ago

Plex is a good example that does just that (not on my rec list but a good example) along with many business grade IPTV and media streaming products (think digital signage).

I'd really love to rework JF to do it, but structurally it wouldn't work, you'd need a management service in front of it.

this post was submitted on 15 Jul 2025

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