How do I take my site offline quickly without a module?

Lately, I've been having problems with my Dolphin application and have needed to stop all MySQL traffic, is there a way to close off my site so I can make changes to things in the backend (administration)?

Quote · 29 Mar 2012
 
 
Below is the legacy version of the Boonex site, maintained for Dolphin.Pro 7.x support.
The new Dolphin solution is powered by UNA Community Management System.