To address the challenge of game servers using IPv4 while your public IP is IPv6 behind a Carrier-Grade NAT (CGNAT), you can set up a bridge between the IPv4 and IPv6 networks. Here's a general outline of the steps you might follow:
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Identify your IP addresses:
- IPv6 Public: This is the IP address assigned to your ISP router by their upstream provider.
- IPv4 Behind CGNAT: This is the IP address assigned to your device by your ISP router.
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Set up a bridge on your device:
- On Linux, you can use the
ip linkandip addrcommands to create a bridge and assign IP addresses to it. - On Windows, you can use the Network and Sharing Center to create a new bridge, and then assign IP addresses to it.
- On Linux, you can use the
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Configure your router:
- Configure your router to forward traffic from the IPv4 address to the IPv6 address. This is often referred to as NAT hairpinning.
- You may need to configure your router's firewall to allow traffic from the IPv4 address to the game server.
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Configure your game server:
- Set the game server's IP address to the IPv6 address on the bridge.
- Ensure that the game server is configured to accept connections from both IPv4 and IPv6 addresses.
Please note that this is a simplified explanation and the exact steps may vary depending on your specific hardware and software configurations.
References: