Today, while upgrading server servers for clients, we upgraded from Apache 2.2 to 2.4. Immediately sites received 403Forbidden. That’s because there is a small change here: http://httpd.apache.org/docs/2.4/upgrading.html

Basically, in your host files, you have to replaces “Allow from all” with “Require all granted” – then restart Apache, and you’ll be back up!