Basically i'm using Mirror and it works perfectly when I and my brother wants to play the game I made, but we're on the same network. When my other brother who doesn't live at home can't connect because it only works with LAN. I tried port forwarding but our ISP has locked that it seems. Is there another way?

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    \$\begingroup\$ Can you walk us through how you're trying to connect now, and how you've configured your port forwarding? This is usually something on your local router, outside your ISP's reach. \$\endgroup\$
    – DMGregory
    Dec 20 '21 at 12:44
  • \$\begingroup\$ Yeah i know i looked up a tutorial online on port forwarding, and the router won't allow me to do that. It's a router made by our ISP too. \$\endgroup\$ Dec 20 '21 at 13:04
  • \$\begingroup\$ Then the next thing you need to look into is NAT punch-through. This is where each client attempts to connect to a facilitating server first, which records the IP/port information each one is using and relays it to the other. With this info, they can then attempt a direct connection to each other that the router should regard as a valid outbound connection and reply, rather than an unsolicited inbound connection. Mirror supports this through its "Fizzy" transport options, according to the documentation. \$\endgroup\$
    – DMGregory
    Dec 20 '21 at 13:11

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