Why Can\'t I Connect to My Amazon EC2 MySQL Database from a Remote Server?

Addressing Connection Issues to MySQL on Amazon EC2 from a Remote Server

When attempting to establish a connection to a MySQL database hosted on an Amazon EC2 instance from a remote server, users may encounter the error "ERROR 2003 (HY000): Can't connect to MySQL server on 'IP' (110)." This error typically indicates an inability to establish a network connection between the remote server and the EC2 instance.

To resolve this issue, it's crucial to ensure that the EC2 instance's security group allows inbound connections to the MySQL port (typically 3306) from the remote server's IP address. Additionally, MySQL's configuration on the EC2 instance needs to be modified to accept connections from remote servers.

As mentioned previously, it's essential to verify MySQL's configuration file, typically located at /etc/mysql/my.cnf on Debian systems. The "bind-address" setting governs which IP addresses MySQL will listen on for incoming connections. By default, MySQL listens only on the local interface (127.0.0.1). To allow remote connections, this setting should be changed to 0.0.0.0, which instructs MySQL to listen on all available network interfaces.

After updating the "bind-address" setting, restart MySQL to apply the changes. On Debian/Ubuntu systems, this can be done using the command "/etc/init.d/mysql restart."

By modifying the security group settings and ensuring that MySQL is configured to listen on the appropriate interface, users should be able to establish a successful connection to the MySQL database hosted on the EC2 instance from the remote server.

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