You’re absolutely right, Mike! 
Thanks for the reminder, UDP doesn’t behave like TCP—no handshake, no canyouseeme checks. My bad there, Tony.
Instead, let’s try asking a friend to attempt connecting to your external IP. If they still can’t get in, check if your router has both port forwarding rules and any required firewall settings.
Another thing: if your server is behind a double NAT (like if you’re using both a router and a modem with routing features), you’ll need to port forward through both. Let me know if you’re unsure how to check for that! 
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