Enhanced User Security

From DreamHost

When you select "Enhanced Security" for any of your users via the panel, those users will have their home directories "locked down." What this means is that the permissions on your home directory will be changed such that absolutely no one besides your user, or the apache user will be able to view anything inside your home directory.

Specifically, "Enhanced Security" means your user's home directory has its permissions set to 750 and its group is changed to adm. This option is much more secure, but is not for people that share data between their users. Learn more