Firejail is a SUID sandbox program that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces, seccomp-bpf and Linux capabilities. It allows a process and all its descendants to have their own private view of the globally shared kernel resources, such as the network stack, process table, mount table. Firejail can work in a SELinux or AppArmor environment, and it is integrated with Linux Control Groups.
Written in C with virtually no dependencies, the software runs on any Linux computer with a 3.x kernel version or newer. It can sandbox any type of processes: servers, graphical applications, and even user login sessions. The software includes sandbox profiles for a number of more common Linux programs, such as Mozilla Firefox, Chromium, VLC, Transmission etc.
The sandbox is lightweight, the overhead is low. There are no complicated configuration files to edit, no socket connections open, no daemons running in the background. All security features are implemented directly in Linux kernel and available on any Linux computer. To start the sandbox, prefix your command with “firejail”:
$ firejail firefox # starting Mozilla Firefox
$ firejail transmission-gtk # starting Transmission BitTorrent
$ firejail vlc # starting VideoLAN Client
$ sudo firejail /etc/init.d/nginx start
Project webpage: https://firejail.wordpress.com/
Download and Installation: https://firejail.wordpress.com/download-2/
Features: https://firejail.wordpress.com/features-3/
Documentation: https://firejail.wordpress.com/documentation-2/
FAQ: https://firejail.wordpress.com/support/frequently-asked-questions/
If you keep your Firejail profiles in a public repository, please give us a link:
--x11=block
Blacklist /tmp/.X11-unix directory, ${HOME}/.Xauthority and file
specified in ${XAUTHORITY} enviroment variable. Remove DISPLAY and
XAUTHORITY enviroment variables. Stop with error message if X11
abstract socket will be accessible in jail.
--put=name|pid src-filename dest-filename
Put src-filename in sandbox container. The container is specified by name or PID.
--allusers
All user home directories are visible inside the sandbox. By default, only current user home
directory is visible.
Example:
$ firejail --allusers
--join-or-start=name
Join the sandbox identified by name or start a new one. Same as "firejail --join=name" if
sandbox with specified name exists, otherwise same as "firejail --name=name ..."
Note that in contrary to other join options there is respective profile option.
--no3d Disable 3D hardware acceleration.
Example:
$ firejail --no3d firefox
--veth-name=name
Use this name for the interface connected to the bridge for
--net=bridge_interface commands, instead of the default one.
Example:
$ firejail --net=br0 --veth-name=if0
x11 xpra, x11 xephyr, x11 block, allusers, join-or-start
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