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How to Enable MySQL Port on Your Linux Dedicated Server

MySQL is an open-source relational database management system that is based on SQL queries. It is compatible with most known programming languages and can be installed on most Linux distributions that exist, such as Ubuntu and CentOS. MySQL runs as a system service in Unix family systems and services are configured through text files. The my.cnf file is the file where all MySQL configurations are defined.

To allow and enable the MySQL port, use the following process:

  1. First, log in to your server as root.
  2. Edit the csf (Firewall) configuration file using the following command:
    nano /etc/csf/csf.conf
  3. Search for the following lines as shown in the image below:
    Screenshot showing the results of the nano /etc/csf/csf.conf command.
  4. Proceed to add the port no 3306 as follows.
    Screenshot showing the addition of Port 3306 to multiple lines within the MySQL configuration file.
  5. Save the changes Ctrl+O followed by Ctrl+X to exit.
  6. Refresh the firewall using the following command:
    csf –r
    Which should give an output similar to the screenshot below.
    Screenshot showing the results of the csf –r command.

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