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CGNAT Explained: Why Port Forwarding Fails

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NetworkingBeginner

What CGNAT is

CGNAT puts many homes behind a shared public IP. Inbound port forwards never reach your PC reliably. UPnP cannot invent a path the carrier does not give you.

The managed fix

Host the game on GlassHosting. Friends connect to datacenter allocations; you stop fighting the ISP. Related: Router and CGNAT issues, port forwarding myths.

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