What is CageFS ?

CageFS is a virtualized file system and a set of tools to contain each user in its own private virtual space. Each customer will have its own fully functional CageFS, with all the system files, tools, etc. With regards to server security, CageFS which works with cloud Linux is an option.

The benefits of CageFS are:

1. Only safe binaries are available to user
2. User will not see any other users, and would have no way to detect presence of other users & their user names on the server
3. User will not be able to see server configuration files, such as Apache config files
4. User's will have limited view of /proc file system, and will not be able to see other' users processes
5. CageFS becomes part of CloudLinux OS and there is no additional charge for it
6. Easy to install and configure CageFS

CageFS will automatically detect and configure all necessary files for:

• cPanel
• Plesk
• DirectAdmin
• ISPmanager
• Interworx
• MySQL
• PostgreSQL
• LiteSpeed

Web interface to manage CageFS is available for cPanel, Plesk 10+, DirectAdmin, ISPmanager & Interworx. Command line tool would need to be used for other control panels.

CageFS provides for two modes of operations:

1. Enabled for all, except those that are disabled
2. Disabled for all, except those that are enabled

Mode #1 is convenient for production operation, where you want all new users to automatically be added to CageFS.
Mode #2 is convenient while you test CageFS, as it allows you to enable it on one by one for your customers.

To start using CageFS you have to select one of the mode of operations.

$ /usr/sbin/cagefsctl --enable-all
or
$ /usr/sbin/cagefsctl --disable-all
or
$ /usr/sbin/cagefsctl --toggle-mode (That will switch the operation mode, preserving current disabled/enabled users)

To enable individual user do:
$ /usr/sbin/cagefsctl --enable [username]

To disable individual user:
$ /usr/sbin/cagefsctl --disable [username]

To see current mode of operation:
$ /usr/sbin/cagefsctl --display-user-mode

Final note: As I explained all the benefits above, I would also recommend CageFS as it gives Security of our account as well as flexibility of own private area.

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