Ubuntu Manpage: profile - Security profile file syntax for Firejail

name
usage
description
scripting
filesystem
security filters
resource limits
cpu affinity
control groups
user environment
networking
relocating profiles
files
license
see also

Provided by: firejail_0.9.38.10-0ubuntu0.16.04.1_amd64

NAME

       profile - Security profile file syntax for Firejail

USAGE

       firejail --profile=filename.profile

DESCRIPTION

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

1. If a profile file is provided by the user with --profile option, the profile file is loaded. Example:

$ firejail --profile=/home/netblue/icecat.profile icecat
Reading profile /home/netblue/icecat.profile
[...]

2. 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:

$ firejail icecat
Command name #icecat#
Found icecat profile in /home/netblue/.config/firejail directory
Reading profile /home/netblue/.config/firejail/icecat.profile
[...]

3. 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:

$ firejail
Reading profile /etc/firejail/generic.profile
Parent pid 8553, child pid 8554
Child process initialized
[...]

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

Scripting

       Scripting commands:

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

              Example: "blacklist ~/My Virtual Machines"

       # this is a comment

       include other.profile
              Include other.profile file.

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

              other.profile file name can be prefixed with ${HOME}. This will force Firejail  to  look  for  the
              file in user home directory.

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

       noblacklist 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"

       ignore command
              Ignore command.

              Example: "ignore seccomp"

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 (blacklist), a read-only file or directory
       (read-only), a tmpfs mounted on top of an existing directory (tmpfs), or mount-bind a directory  or  file
       on  top  of  another  directory  or  file  (bind).   Use  private  to set private mode.  File globbing is
       supported, and PATH and HOME directories are searched.  Examples:

       blacklist file_or_directory
              Blacklist directory or file. Examples:

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

       read-only file_or_directory
              Make directory or file read-only.

       tmpfs directory
              Mount an empty tmpfs filesystem on top of directory. This option is available  only  when  running
              the sandbox as root.

       bind directory1,directory2
              Mount-bind directory1 on top of directory2. This option is only available when running as root.

       bind file1,file2
              Mount-bind file1 on top of file2. This option is only available when running as root.

       private
              Mount  new  /root  and  /home/user  directories  in  temporary  filesystems. All modifications are
              discarded when the sandbox is closed.

       private directory
              Use directory as user home.

       private-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.

       private-dev
              Create  a new /dev directory. Only dri, null, full, zero, tty, pts, ptmx, random, urandom, log and
              shm devices are available.

       private-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.

       private-tmp
              Mount an empty temporary filesystem on top of /tmp directory.

       whitelist file_or_directory
              Build  a  new  user  home  in  a  temporary  filesystem,  and  mount-bind  file_or_directory.  The
              modifications to file_or_directory are persistent, everything else is discarded when  the  sandbox
              is closed.

       tracelog
              Blacklist violations logged to syslog.

Security filters

The following security filters are currently implemented:

caps Enable default Linux capabilities filter.

caps.drop all
Blacklist all Linux capabilities.

caps.drop capability,capability,capability
Blacklist given Linux capabilities.

caps.keep capability,capability,capability
Whitelist given Linux capabilities.

protocol protocol1,protocol2,protocol3
Enable protocol filter. The filter is based on seccomp and checks the first argument to socket
system call. Recognized values: unix, inet, inet6, netlink and packet.

seccomp
Enable default seccomp filter. The default list is as follows: mount, umount2, ptrace,
kexec_load, open_by_handle_at, init_module, finit_module, delete_module, iopl, ioperm, swapon,
swapoff, syslog, process_vm_readv and process_vm_writev, sysfs,_sysctl, adjtimex, clock_adjtime,
lookup_dcookie, perf_event_open, fanotify_init and kcmp.

seccomp syscall,syscall,syscall
Enable seccomp filter and blacklist the system calls in the list on top of default seccomp filter.

seccomp.drop syscall,syscall,syscall
Enable seccomp filter and blacklist the system calls in the list.

seccomp.keep syscall,syscall,syscall
Enable seccomp filter and whitelist the system calls in the list.

noroot 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.

Resource limits

       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 ulimit command. Example:

       rlimit-fsize 1024
              Set the maximum file size that can be created by a process to 1024 bytes.

       rlimit-nproc 1000
              Set  the  maximum  number  of  processes  that  can be created for the real user ID of the calling
              process to 1000.

       rlimit-nofile 500
              Set the maximum number of files that can be opened by a process to 500.

       rlimit-sigpending 200
              Set the maximum number of processes that can be created for  the  real  user  ID  of  the  calling
              process to 200.

CPU Affinity

       Set the CPU cores available for this sandbox using cpu command. Examples:

       cpu 1,2,3
              Use only CPU cores 0, 1 and 2.

Control Groups

       Place  the sandbox in an existing control group specified by the full path of the task file using cgroup.
       Example:

       cgroup /sys/fs/cgroup/g1/tasks
              The sandbox is placed in g1 control group.

User Environment

       name sandboxname
              Set sandbox name. Example:

              name browser

       env name=value
              Set environment variable. Examples:

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

       nogroups
              Disable supplementary user groups

       shell none
              Run the program directly, without a shell.

Networking

       Networking features available in profile files.

       netfilter
              If a new network namespace is created, enabled default network filter.

       netfilter filename
              If a new network namespace is created, enabled the network filter in filename.

       net 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.

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

       hostname name
              Set a hostname for the sandbox.

RELOCATING PROFILES

       For various reasons some users might want to keep the profile files  in  a  different  directory.   Using
       --profile-path 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:

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

       Using sed utility, modify the absolute paths for include commands:

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

       Start Firejail using the new path:

       $ firejail --profile-path=~/myprofiles

FILES

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

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.

       Homepage: http://firejail.wordpress.com