path: root/src/man/firejail-profile.txt

.TH FIREJAIL-PROFILE 5 "MONTH YEAR" "VERSION" "firejail profiles man page"
.SH NAME
profile \- Security profile file syntax for Firejail

.SH USAGE
.TP
firejail \-\-profile=filename.profile

.SH DESCRIPTION
Several command line options can be passed to the program using
profile files. Firejail chooses the profile file as follows:

\fB1.\fR If a profile file is provided by the user with \-\-profile option, the profile file is loaded.
Example:
.PP
.RS
$ firejail --profile=/home/netblue/icecat.profile icecat
.br
Reading profile /home/netblue/icecat.profile
.br
[...]
.RE

\fB2.\fR If a profile file with the same name as the application is present in ~/.config/firejail directory or
in /etc/firejail, the profile is loaded. ~/.config/firejail takes precedence over /etc/firejail. Example:
.PP
.RS
$ firejail icecat
.br
Command name #icecat#
.br
Found icecat profile in /home/netblue/.config/firejail directory
.br
Reading profile /home/netblue/.config/firejail/icecat.profile
.br
[...]
.RE

\fB3.\fR Use a default.profile file if the sandbox
is started by a regular user, or a server.profile file if the sandbox
is started by root. Firejail looks for these files in ~/.config/firejail directory, followed by /etc/firejail directory.
To disable default profile loading, use --noprofile command option. Example:
.PP
.RS
$ firejail
.br
Reading profile /etc/firejail/default.profile
.br
Parent pid 8553, child pid 8554
.br
Child process initialized
.br
[...] 
.br

.br
$ firejail \-\-noprofile
.br
Parent pid 8553, child pid 8554
.br
Child process initialized
.br
[...]
.RE

.SH Scripting
Scripting commands:

.TP
\fBFile and directory names
File and directory names containing spaces are supported. The space character ' ' should not be escaped.

Example: "blacklist ~/My Virtual Machines"

.TP
\fB# this is a comment

.TP
\fBinclude other.profile
Include other.profile file.

Example: "include /etc/firejail/disable-common.inc"

The file name can be prefixed with a macro such as ${HOME} or ${CFG}.
${HOME} is expanded as user home directory, and ${CFG} is expanded as
Firejail system configuration directory - in most cases /etc/firejail or
/usr/local/etc/firejail.

Example: "include ${HOME}/myprofiles/profile1" will load "~/myprofiles/profile1" file.

Example: "include ${CFG}/firefox.profile" will load "/etc/firejail/firefox.profile" file.

System configuration files in ${CFG} are overwritten during software installation.
Persistent configuration at system level is handled in ".local" files. For every
profile file in ${CFG} directory, the user can create a corresponding .local file 
storing modifications to the persistent configuration. Persistent .local files
are included at the start of regular profile files.

.TP
\fBnoblacklist file_name
If the file name matches file_name, the file will not be blacklisted in any blacklist commands that follow.

Example: "noblacklist ${HOME}/.mozilla"

.TP
\fBignore
Ignore command.

Example: "ignore seccomp"

.TP
\fBquiet
Disable Firejail's output. This should be the first uncommented command in the profile file.

Example: "quiet"

.SH Filesystem
These profile entries define a chroot filesystem built on top of the existing
host filesystem. Each line describes a file element that is removed from
the filesystem (\fBblacklist\fR), a read-only file or directory (\fBread-only\fR),
a tmpfs mounted on top of an existing directory (\fBtmpfs\fR),
or mount-bind a directory  or file on top of another directory or file (\fBbind\fR).
Use \fBprivate\fR to set private mode.
File globbing is supported, and PATH and HOME directories are searched.
Examples:
.TP
\fBblacklist file_or_directory
Blacklist directory or file. Examples:
.br

.br
blacklist /usr/bin
.br
blacklist /usr/bin/gcc*
.br
blacklist ${PATH}/ifconfig
.br
blacklist ${HOME}/.ssh

.TP
\fBblacklist-nolog file_or_directory
When --tracelog flag is set, blacklisting generates syslog messages if the sandbox tries to access the file or directory.
blacklist-nolog command disables syslog messages for this particular file or directory. Examples:
.br

.br
blacklist-nolog /usr/bin
.br
blacklist-nolog /usr/bin/gcc*

.TP
\fBbind directory1,directory2
Mount-bind directory1 on top of directory2. This option is only available when running as root.
.TP
\fBbind file1,file2
Mount-bind file1 on top of file2. This option is only available when running as root.
.TP
\fBmkdir directory
Create a directory in user home before the sandbox is started.
The directory is created if it doesn't already exist.
.br

.br
Use this command for whitelisted directories you need to preserve
when the sandbox is closed. Without it, the application will create the directory, and the directory
will be deleted when the sandbox is closed. Subdirectories are recursively created. Example from
firefox profile:
.br

.br
mkdir ~/.mozilla
.br
whitelist ~/.mozilla
.br
mkdir ~/.cache/mozilla/firefox
.br
whitelist ~/.cache/mozilla/firefox
.TP
\fBmkfile file
Similar to mkdir, this command creates a file in user home before the sandbox is started.
The file is created if it doesn't already exist, but it's target directory has to exist.
.TP
\fBnoexec file_or_directory
Remount the file or the directory noexec, nodev and nosuid.
.TP
\fBprivate
Mount new /root and /home/user directories in temporary
filesystems. All modifications are discarded when the sandbox is
closed.
.TP
\fBprivate directory
Use directory as user home.
.TP
\fBprivate-home file,directory
Build a new user home in a temporary
filesystem, and copy the files and directories in the list in the
new home. All modifications are discarded when the sandbox is
closed.
.TP
\fBprivate-bin file,file
Build a new /bin in a temporary filesystem, and copy the programs in the list.
The same directory is also bind-mounted over /sbin, /usr/bin and /usr/sbin.
.TP
\fBprivate-dev
Create a new /dev directory. Only dri, null, full, zero, tty, pts, ptmx, random, urandom, log and shm devices are available.
.TP
\fBprivate-etc file,directory
Build a new /etc in a temporary
filesystem, and copy the files and directories in the list.
All modifications are discarded when the sandbox is closed.
.TP
\fBprivate-opt file,directory
Build a new /optin a temporary
filesystem, and copy the files and directories in the list.
All modifications are discarded when the sandbox is closed.
.TP
\fBprivate-srv file,directory
Build a new /srv in a temporary
filesystem, and copy the files and directories in the list.
All modifications are discarded when the sandbox is closed.
.TP
\fBprivate-tmp
Mount an empty temporary filesystem on top of /tmp directory whitelisting /tmp/.X11-unix.
.TP
\fBread-only file_or_directory
Make directory or file read-only.
.TP
\fBread-write file_or_directory
Make directory or file read-write.
.TP
\fBtmpfs directory
Mount an empty tmpfs filesystem on top of directory. This option is available only when running the sandbox as root.
.TP
\fBtracelog
Blacklist violations logged to syslog.
.TP
\fBwhitelist file_or_directory
Whitelist directory or file. A temporary file system is mounted on the top directory, and the
whitelisted files are mount-binded inside. Modifications to whitelisted files are persistent,
everything else is discarded when the sandbox is closed. The top directory could be 
user home, /dev, /media, /mnt, /opt, /srv, /var, and /tmp.
.br

.br
Symbolic link handling: with the exception of user home, both the link and the real file should be in
the same top directory. For user home, both the link and the real file should be owned by the user.
.TP
\fBwritable-etc
Mount /etc directory read-write.
.TP
\fBwritable-var
Mount /var directory read-write.
.TP
\fBwritable-var-log
Use the real /var/log directory, not a clone. By default, a tmpfs is mounted on top of /var/log
directory, and a skeleton filesystem is created based on the original /var/log.

.SH Security filters
The following security filters are currently implemented:

.TP
\fBapparmor
Enable AppArmor confinement.
.TP
\fBcaps
Enable default Linux capabilities filter.
.TP
\fBcaps.drop all
Blacklist all Linux capabilities.
.TP
\fBcaps.drop capability,capability,capability
Blacklist given Linux capabilities.
.TP
\fBcaps.keep capability,capability,capability
Whitelist given Linux capabilities.
.TP
\fBprotocol protocol1,protocol2,protocol3
Enable protocol filter. The filter is based on seccomp and  checks the
first argument to socket system call. Recognized values: \fBunix\fR,
\fBinet\fR, \fBinet6\fR, \fBnetlink\fR and \fBpacket\fR.
.TP
\fBseccomp
Enable seccomp filter and blacklist the syscalls in the default list. See man 1 firejail for more details.
.TP
\fBseccomp syscall,syscall,syscall
Enable seccomp filter and blacklist the system calls in the list on top of default seccomp filter.
.TP
\fBseccomp.drop syscall,syscall,syscall
Enable seccomp filter and blacklist  the system calls in the list.
.TP
\fBseccomp.keep syscall,syscall,syscall
Enable seccomp filter and whitelist the system calls in the list.
.TP
\fBnonewprivs
Sets the NO_NEW_PRIVS prctl.  This ensures that child processes
cannot acquire new privileges using execve(2);  in particular,
this means that calling a suid binary (or one with file capabilities)
does not result in an increase of privilege.
.TP
\fBnoroot
Use this command  to enable an user namespace. The namespace has only one user, the current user.
There is no root account (uid 0) defined in the namespace.
.TP
\fBx11
Enable X11 sandboxing.
.TP
\fBx11 none
Blacklist /tmp/.X11-unix directory, ${HOME}/.Xauthority and file specified in ${XAUTHORITY} environment variable.
Remove DISPLAY and XAUTHORITY environment variables.
Stop with error message if X11 abstract socket will be accessible in jail.
.TP
\fBx11 xephyr
Enable X11 sandboxing with Xephyr server.
.TP
\fBx11 xorg
Enable X11 sandboxing with X11 security extension.
.TP
\fBx11 xpra
Enable X11 sandboxing with Xpra server.
.TP
\fBx11 xvfb
Enable X11 sandboxing with Xvfb server.

.SH Resource limits, CPU affinity, Control Groups
These profile entries define the limits on system resources (rlimits) for the processes inside the sandbox.
The limits can be modified inside the sandbox using the regular \fBulimit\fR command. \fBcpu\fR command
configures the CPU cores available, and \fBcgroup\fR command
place the sandbox in an existing control group.

Examples:

.TP
\fBrlimit-fsize 1024
Set the maximum file size that can be created by a process to 1024 bytes.
.TP
\fBrlimit-nproc 1000
Set the maximum number of processes that can be created for the real user ID of the calling process to 1000.
.TP
\fBrlimit-nofile 500
Set the maximum number of files that can be opened by a process to 500.
.TP
\fBrlimit-sigpending 200
Set the maximum number of processes that can be created for the real user ID of the calling process to 200.
.TP
\fBcpu 1,2,3
Use only CPU cores 0, 1 and 2.
.TP
\fBnice -5
Set a nice value of -5 to all processes running inside the sandbox.
.TP
\fBcgroup /sys/fs/cgroup/g1/tasks
The sandbox is placed in g1 control group.

.SH User Environment
.TP
\fBallusers
All user home directories are visible inside the sandbox. By default, only current user home directory is visible.

.TP
\fBname sandboxname
Set sandbox name. Example:
.br

.br
name browser

.TP
\fBenv name=value
Set environment variable. Examples:
.br

.br
env LD_LIBRARY_PATH=/opt/test/lib
.br
env CFLAGS="-W -Wall -Werror"

.TP
\fBnogroups
Disable supplementary user groups
.TP
\fBshell none
Run the program directly, without a shell.
.TP
\fBipc-namespace
Enable IPC namespace.
.TP
\fBnosound
Disable sound system.
.TP
\fBno3d
Disable 3D hardware acceleration.

.SH Networking
Networking features available in profile files.

.TP
\fBdefaultgw address
Use this address as default gateway in the new network namespace.

.TP
\fBdns address
Set a DNS server for the sandbox. Up to three DNS servers can be defined.

.TP
\fBhostname name
Set a hostname for the sandbox.

.TP
\fBhosts-file file
Use file as /etc/hosts.

.TP
\fBip address
Assign IP addresses to the last network interface defined by a net command. A
default gateway is assigned by default.
.br

.br
Example:
.br
net eth0
.br
ip 10.10.20.56

.TP
\fBip none
No IP address and no default gateway are configured for the last interface
defined by a net command. Use this option
in case you intend to start an external DHCP client in the sandbox.
.br

.br
Example:
.br
net eth0
.br
ip none

.TP
\fBip6 address
Assign IPv6 addresses to the last network interface defined by a net command.
.br

.br
Example:
.br
net eth0
.br
ip6 2001:0db8:0:f101::1/64

.TP
\fBiprange address,address
Assign  an  IP address in the provided range to the last network
interface defined by  a  net command.  A  default  gateway  is assigned by default.
.br

.br
Example:
.br

.br
net eth0
.br
iprange 192.168.1.150,192.168.1.160
.br

.TP
\fBmac address
Assign MAC addresses to the last network interface defined by a net command.

.TP
\fBmachine-id
Spoof id number in /etc/machine-id file - a new random id is generated inside the sandbox.

.TP
\fBmtu number
Assign a MTU value to the last network interface defined by a net command.



.TP
\fBnetfilter
If a new network namespace is created, enabled default network filter.

.TP
\fBnetfilter filename
If a new network namespace is created, enabled the network filter in filename.

.TP
\fBnet bridge_interface
Enable a new network namespace and connect it to this bridge interface.
Unless specified with option \-\-ip and \-\-defaultgw, an IP address and a default gateway will be assigned
automatically to the sandbox. The IP address is verified using ARP before assignment. The address
configured as default gateway is the bridge device IP address. Up to four \-\-net
bridge devices can be defined. Mixing bridge and macvlan devices is allowed.

.TP
\fBnet ethernet_interface
Enable a new network namespace and connect it
to this ethernet interface using the standard Linux macvlan
driver. Unless specified with option \-\-ip and \-\-defaultgw, an
IP address and a default gateway will be assigned automatically
to the sandbox. The IP address is verified using ARP before
assignment. The address configured as default gateway is the
default gateway of the host. Up to four \-\-net devices can
be defined. Mixing bridge and macvlan devices is allowed.
Note: wlan devices are not supported for this option.

.TP
\fBnet none
Enable a new, unconnected network namespace. The only interface
available in the new namespace is a new loopback interface (lo).
Use this option to deny network access to programs that don't
really need network access.

.TP
\fBveth-name name
Use this name for the interface connected to the bridge for --net=bridge_interface commands, 
instead of the default one.

.SH Other
.TP
\fBjoin-or-start sandboxname
Join the sandbox identified by name or start a new one.
Same as "firejail --join=sandboxname" command if sandbox with specified name exists, otherwise same as "name sandboxname".

.SH RELOCATING PROFILES
For various reasons some users might want to keep the profile files in a different directory.
Using \fB--profile-path\fR command line option, Firejail can be instructed to look for profiles
into this directory.

This is an example of relocating the profile files into a new
directory, /home/netblue/myprofiles. Start by creating the new directory and copy all
the profile files in:
.br

.br
$ mkdir ~/myprofiles && cd ~/myprofiles && cp /etc/firejail/* .
.br

.br
Using \fBsed\fR utility, modify the absolute paths for \fBinclude\fR commands:
.br

.br
$ sed -i "s/\\/etc\\/firejail/\\/home\\/netblue\\/myprofiles/g" *.profile
.br
$ sed -i "s/\\/etc\\/firejail/\\/home\\/netblue\\/myprofiles/g" *.inc
.br

.br
Start Firejail using the new path:
.br

.br
$ firejail --profile-path=~/myprofiles

.SH FILES
/etc/firejail/filename.profile, $HOME/.config/firejail/filename.profile

.SH LICENSE
Firejail is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
.PP
Homepage: http://firejail.wordpress.com
.SH SEE ALSO
\&\flfirejail\fR\|(1),
\&\flfiremon\fR\|(1),
\&\flfirecfg\fR\|(1),
\&\flfirejail-login\fR\|(5)