@bot @7666 you make a request, the router sends it to the website and back to you. I believe it's achieved through NAT through routers and networking are the most frustrating thing I've dealt with for some reason, it's not that they're hard I've just been exceptionally unlucky

as for another machine directly contacting yours (initiating the connection), this can either be done through port forwarding (router maps a specific local device port 6969 to public IP port 6969), not possible to have multiple devices serve the same port from one IP