I have a site that did run without problems for at least 5 years. Now, all of a sudden, I (or visitors) cannot connect, because
Database Error: Unable to connect to your database. Your database appears to be turned off or the database connection settings in your config file are not correct. Please contact your hosting provider if the problem persists.the site is unavaiable, I cannot log in the CP
I can reach the confog file through FTP, and all settings seem to be correct.
My ISP can connect to the database, they do not see anything strange.
What could this be? It just happened, out of the blue.