Configure WordPress to connect to Mysql DB using SSH tunneling

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Problem: Configure wordpress to use a remote mysql database only available using and SSH tunneling.

Stage:
I have a wordpress instance over an apache server on machine (called WP_server). WP_server, does not have Mysql server and has blocked port except 80 (http) and 22 (ssh).

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In other place is another machine (Mysql_server) which has a MySQL instance. This server can provide a database to WP_server.

These two server have ssh access.

How should I configure wordpress to use ssh tunneling?

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2 comments

  1. You should create a ssh tunnel between the 2 serves. Then you can connect from the WP with only the mysql server ip.

    ssh -f user@personal-server.com -L 2000:personal-server.com:25 -N

    The -f tells ssh to go into the background just before it executes the command.

    This is followed by the username and server you are logging into.

    The -L 2000:personal-server.com:25 is in the form of -L local-port:host:remote-port.

    Finally the -N instructs OpenSSH to not execute a command on the remote system.

    via Revsys

  2. You can use a custom DB handler in wordpress. Extend the wpdb class located in wp-includes/wpdb.php file, and modify things to fit your needs. Be sure to create an instance called $wpdb at the very end of it.

    Then, drop the file in wp-content/db.php. It will be used in place of the wpdb class.