this post was submitted on 31 Oct 2025
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you can make very cheap to maintain peer to peer solutions
you can use a STUN server to discover your public IP and use a method called UDP hole punching to open a port others can connect to. STUN servers are very cheap to run: they don’t actually handle the data; just provide a kind of handshake service in the middle for coordinating
this is often used for peer to peer video chat etc