How Can I Securely Connect to a Remote MySQL Database via SSH Using PHP?

MySQL Remote Connection over SSH Using PHP

To establish a secure connection to a remote MySQL database over SSH, consider employing the following approaches:

SSH Tunnel Method

• Step 1: Set up SSH Tunnel

Utilize the command line to establish an SSH tunnel like this:

ssh -fNg -L 3307:10.3.1.55:3306 [email protected]

where:

• 3307: Local port on your machine
• 10.3.1.55: MySQL database server address
• 3306: MySQL database port
• Step 2: Connect via SSH Tunnel

Instruct your MySQL client to connect through the tunnel:

mysql -h 127.0.0.1 -P 3307 -u dbuser -p passphrase

• Step 3: PHP Connection

Connect your PHP application to the tunnel:

$smysql = mysql_connect("127.0.0.1:3307", "dbuser", "passphrase");
mysql_select_db("db", $smysql);

Security Considerations

It's crucial to prioritize security when establishing remote MySQL connections. Ensure the Jumpbox/Bastion Host is the tunnel target and not the database server. This mitigates the risk of exposing your database to the internet. Consider utilizing SSH key authentication for enhanced security.

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