ap24-mod_mpm_itk

Run each vhost under a separate uid and gid

apache2-mpm-itk (just mpm-itk for short) is an MPM (Multi-Processing Module) for the Apache web server. mpm-itk allows you to run each of your vhost under a separate uid and gid - in short, the scripts and configuration files for one vhost no longer have to be readable for all the other vhosts.