This was a really difficult issue to track down. @jruiz94 and I were chatting back and forth in a Minecraft server I had stood up and sent him an identity for…
He eventually sent me a feedback log and I noticed in there one small line with server[udp:::1:19132] connected which I immediately wondered if IPv6 was getting in the way.
It seems that IPv6 was the problem! He was able to use the udp-server.ps1 to test UDP successfully by changing the host.v1 from using localhost to using either 127.0.0.1 or 192.168.x.x. I personally turn IPv6 support off on my Windows machine because I’ve had it cause issues like this in the past for me, which is why it worked for me…
Since he was able to test UDP successfully using that tool, I think he’ll be successful at using minecraft. We’ll wait for a follow up!