Error establishing RPC node connection: Unable to determine validator public IP address

As a Solana developer, you are probably no stranger to the challenges associated with setting up a remote server for testing and development. A common issue that can arise when using Hetzner servers is connectivity to the RPC node. In this article, we will troubleshoot the “Unable to determine validator public IP address” error and explore possible solutions.

Problem: Unable to determine validator public IP address

The error message indicates that the Solana RPC node connection timed out because the validator public IP address could not be retrieved. This is a common issue when using a leased Hetzner server, as it can be difficult to obtain the server’s public IP address directly.

Step-by-step troubleshooting guide

To resolve this issue, follow these steps:

• Check your server configuration: Make sure that your Solana server has the necessary firewall rules in place to allow connections from other devices.

• Check Network Connectivity: Check the server’s network connectivity by running “ip addr” or “dig +short 8.8.8.8” to see if the router is working properly.

• Check IP Address Assignment: Check if your Hetzner server has been assigned a public IP address through your account settings or DNS configurations.

• Use the “curl” command: Try to get the public IP address of the tester using the “curl” command: “curl -I localhost:8555”

• Check RPC Node Configuration: Check the Solana RPC node configuration file (“solana.config.json”) for typos or incorrect settings that may prevent the connection.

• Check Firewall Rules: Make sure that firewall rules are not blocking incoming connections from other computers.

Possible Solutions

If none of these steps resolve the issue, consider the following possible solutions:

• If you are experiencing issues with the IP address or configuration, please contact your Hetzner server administrator.

• For example, try using a different connection method for the RPC node. For example, ” instead of “curl”.

• Make sure that the Solana client is properly configured and does not conflict with the RPC node.

Conclusion

In summary, it can be difficult to obtain the public IP address of the verifier if you are setting up an RPC node on a leased Hetzner server. Following these steps and the troubleshooting guide should resolve the issue and allow you to successfully connect to the Solana RPC node. If the issue persists, please feel free to contact Hetzner support or get further assistance from the Solana community.

Additional Resources

• [Anza Documentation: RPC Node Connection](

• [Hetzner Server Documentation: Firewall Rules](

• [Solana Client Documentation: RPC Node Configuration](

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