Why am I getting a 'Connection Failure' error when trying to connect to my remote MySQL server?

Error: SQLSTATE[HY000] [2002] Connection Failure

Problem:

When connecting to a remote MySQL server from a local machine, the following error occurs:

SQLSTATE[HY000] [2002] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

Environment:

• Laravel 5.1
• Remote MySQL server: srv3.linuxisrael.co.il

• Local environment (env file):

  • DB_HOST=srv3.linuxisrael.co.il
  • DB_DATABASE=name_of_my_database
  • DB_USERNAME=moti_winkler
  • DB_PASSWORD=1234567890

Additional Context:

• The error occurs when trying to create a user using the following code:

<code class="php">User::create(['first_name' =&gt; 'moti']);</code>

Possible Cause and Solution:

The error suggests that the remote server is not responding to connection attempts from the local machine. This is likely because the MySQL socket on the remote server is not accessible from the public-facing interface.

To connect successfully, the following steps may be necessary:

• Configure the remote MySQL server to allow connections from the local machine. This can involve adjusting settings in the server's configuration file (/etc/my.cnf).
• Ensure that the local machine is able to communicate with the remote server on the MySQL port (default: 3306). This may require firewall rules or network configurations to be modified.
• Confirm that the provided credentials (host, database, username, and password) are correct in the local environment (.env file).
• Restart the local environment after making any configuration changes to ensure they take effect.

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