Why Can\'t My PHP Application Connect to My Remote MySQL Server (Error 10060)?

Connecting to a Remote MySQL Server with PHP: Troubleshooting Connectivity Issues

When attempting to connect to a remote MySQL server from a local virtualhost using PHP, users may encounter an error message indicating an inability to connect. This article addresses the resolution of this issue, providing specific troubleshooting steps.

Problem Description

A user attempts to connect to a remote MySQL server from their local virtualhost but receives an error message stating, "Can't connect to MySQL server on 'xxx.xxx.xxx.xxx' (10060)." The issue persists even when using the command line to connect.

Potential Causes and Solutions

Two primary causes can result in this connectivity issue:

• Firewall Configuration: The firewall of the remote server may not be configured to allow incoming connections on port 3306, which is typically used by MySQL servers. To resolve this, ensure that the firewall is configured to permit connections on port 3306.
• Database User Permissions: There must be a user in the MySQL database who is authorized to connect from the machine's IP address (% for any host). Verify that the appropriate database user with the required permissions exists and can connect from the local machine.

Additional Considerations

After resolving the firewall configuration issue, the database user permissions problem may arise. It is essential to ensure that the firewall is configured correctly and that the database user has the necessary permissions to connect remotely.

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