Provided by: firejail_0.9.66-2_amd64 bug

NAME

       profile - Security profile file syntax, and information about building new application profiles.

SYNOPSIS

       Using a specific profile:

              firejail --profile=filename.profile

                     Example:
                     $ firejail --profile=/etc/firejail/kdenlive.profile --appimage kdenlive.appimage

              firejail --profile=profile_name

                     Example:
                     $ firejail --profile=kdenlive --appimage kdenlive.appimage

       Building a profile manually:

              Start  with  the  template  in  /usr/share/doc/firejail/profile.template  and  modify it in a text
              editor.  To  integrate  the  program  in  your  desktop  environment  copy  the  profile  file  in
              ~/.config/firejail directory and run "sudo firecfg".

       Aliases and redirections:

              In  some  cases  the  same  profile  can  be  used  for several applications.  One such example is
              LibreOffice.   Build  a  regular  profile  for  the  main  application,  and  for  the  rest   use
              /usr/share/doc/firejail/redirect_alias-profile.template.

       Running the profile builder:

              firejail --build=appname.profile appname

                     Example:
                     $ firejail --build=blobby.profile blobby

                     Run  the  program  in  "firejail  --build"  and try to exercise as many program features as
                     possible.  The profile is extracted and saved in the current directory. Open it in  a  text
                     editor  and  add  or remove sandboxing options as necessary. Test again after modifying the
                     profile. To integrate the program in your desktop environment  copy  the  profile  file  in
                     ~/.config/firejail directory and run "sudo firecfg".

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.  If  a
       profile name is given, it is searched for first in the ~/.config/firejail directory and if not found then
       in  /etc/firejail directory. Profile names do not include the .profile suffix.  Example:

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

              $ firejail --profile=icecat icecat-wrapper.sh
              Reading profile /etc/firejail/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/default.profile
              Parent pid 8553, child pid 8554
              Child process initialized
              [...]

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

Templates

       In /usr/share/doc/firejail there are two templates to write new profiles.
              profile.template - for regular profiles
              redirect_alias-profile.template - for aliasing/redirecting profiles

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
              Example:

              # disable networking
              net none # this command creates an empty network namespace

       ?CONDITIONAL: profile line
              Conditionally add profile line.

              Example: "?HAS_APPIMAGE: whitelist ${HOME}/special/appimage/dir"

              This example will load the whitelist profile line only if the --appimage option has been specified
              on the command line.

              Currently  the  only  conditionals  supported  this  way  are  HAS_APPIMAGE,  HAS_NET, HAS_NODBUS,
              HAS_NOSOUND, HAS_PRIVATE and HAS_X11. The conditionals BROWSER_DISABLE_U2F  and  BROWSER_ALLOW_DRM
              can be enabled or disabled globally in Firejail's configuration file.

              The  profile  line  may  be  any  profile line that you would normally use in a profile except for
              "quiet" and "include" lines.

       include 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.

              The  file  name may also be just the name without the leading directory components.  In this case,
              first the user config directory (${HOME}/.config/firejail) is searched for the file  name  and  if
              not  found  then the system configuration directory is search for the file name.  Note: Unlike the
              --profile option which takes a profile name without the '.profile' suffix, include must  be  given
              the full file name.

              Example:  "include  firefox.profile" will load "${HOME}/.config/firejail/firefox.profile" file and
              if it does not exist "${CFG}/firefox.profile" will be loaded.

              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.

       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"

       nowhitelist file_name
              If  the  file  name  matches file_name, the file will not be whitelisted in any whitelist commands
              that follow.

              Example: "nowhitelist ~/.config"

       ignore Ignore command.

              Example: "ignore seccomp"
              Example: "ignore net eth0"

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

              Example: "quiet"

Filesystem

       These profile entries define a chroot filesystem built on top of the existing host filesystem. Each  line
       describes a file/directory that is inaccessible (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, see the firejail FILE GLOBBING section for more details.  Examples:

       blacklist file_or_directory
              Blacklist directory or file. Examples:

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

       blacklist-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:

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

       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.

       disable-mnt
              Disable /mnt, /media, /run/mount and /run/media access.

       keep-config-pulse
              Disable  automatic  ~/.config/pulse  init, for complex setups such as remote pulse servers or non-
              standard socket paths.

       keep-dev-shm
              /dev/shm directory is untouched (even with private-dev).

       keep-var-tmp
              /var/tmp directory is untouched.

       mkdir directory
              Create a directory in user home, under /tmp,  or  under  /run/user/<UID>  before  the  sandbox  is
              started.  The directory is created if it doesn't already exist.

              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:

              mkdir ~/.mozilla
              whitelist ~/.mozilla
              mkdir ~/.cache/mozilla/firefox
              whitelist ~/.cache/mozilla/firefox

              For files in /run/user/<PID> use ${RUNUSER} macro:

              mkdir ${RUNUSER}/firejail-testing

       mkfile file
              Similar  to  mkdir,  this  command  creates  an  empty  file  in  user  home,  or  /tmp,  or under
              /run/user/<UID> before the sandbox is started. The file is created if it doesn't already exist.

       noexec file_or_directory
              Remount the file or the directory noexec, nodev and nosuid.

       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 files in the
              list must be expressed as relative to the /bin,  /sbin,  /usr/bin,  /usr/sbin,  or  /usr/local/bin
              directories.  The same directory is also bind-mounted over /sbin, /usr/bin and /usr/sbin.

       private-cache
              Mount an empty temporary filesystem on top of the .cache directory in user home. All modifications
              are discarded when the sandbox is closed.

       private-cwd
              Set working directory inside jail to the home directory, and failing that, the root directory.

       private-cwd directory
              Set working directory inside the jail.

       private-dev
              Create  a  new  /dev  directory.  Only  disc,  dri, dvb, hidraw, null, full, zero, tty, pts, ptmx,
              random, snd, urandom, video, log, shm and usb devices are available.  Use the options no3d, nodvd,
              nosound, notv, nou2f and novideo for additional restrictions.

       private-etc file,directory
              Build a new /etc in a temporary filesystem, and copy the files and directories in the  list.   The
              files  and  directories  in the list must be expressed as relative to the /etc directory, and must
              not contain the / character (e.g.,  /etc/foo  must  be  expressed  as  foo,  but  /etc/foo/bar  --
              expressed  as  foo/bar  --  is  disallowed).   All modifications are discarded when the sandbox is
              closed.

       private-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.  The files and directories in the list must be expressed as relative to the  current
              user's home directory.  All modifications are discarded when the sandbox is closed.

       private-lib file,directory
              Build  a  new  /lib  directory and bring in the libraries required by the application to run.  The
              files and directories in the list must be expressed as  relative  to  the  /lib  directory.   This
              feature is still under development, see man 1 firejail for some examples.

       private-opt file,directory
              Build  a  new /opt in a temporary filesystem, and copy the files and directories in the list.  The
              files and directories in the list must be expressed as relative to the /opt  directory,  and  must
              not  contain  the  /  character  (e.g.,  /opt/foo  must  be  expressed as foo, but /opt/foo/bar --
              expressed as foo/bar -- is disallowed).  All modifications  are  discarded  when  the  sandbox  is
              closed.

       private-srv file,directory
              Build  a  new /srv in a temporary filesystem, and copy the files and directories in the list.  The
              files and directories in the list must be expressed as relative to the /srv  directory,  and  must
              not  contain  the  /  character  (e.g.,  /srv/foo  must  be  expressed as foo, but /srv/foo/bar --
              expressed as foo/bar -- is disallowed).  All modifications  are  discarded  when  the  sandbox  is
              closed.

       private-tmp
              Mount an empty temporary filesystem on top of /tmp directory whitelisting /tmp/.X11-unix.

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

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

       tmpfs directory
              Mount an empty tmpfs filesystem on top of directory. Directories outside user home or not owned by
              the user are not allowed. Sandboxes running as root are exempt from these restrictions.

       tracelog
              Blacklist violations logged to syslog.

       whitelist 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 can be all directories
              in / (except /proc and /sys), /sys/module, /run/user/$UID, $HOME and all directories in /usr.

              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.

       writable-etc
              Mount /etc directory read-write.

       writable-run-user
              Disable the default blacklisting of run/user/$UID/systemd and /run/user/$UID/gnupg.

       writable-var
              Mount /var directory read-write.

       writable-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.

Security filters

       The following security filters are currently implemented:

       allow-debuggers
              Allow tools such as strace and gdb inside the sandbox by  whitelisting  system  calls  ptrace  and
              process_vm_readv.

       apparmor
              Enable AppArmor confinement.

       caps   Enable default Linux capabilities filter.

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

       caps.drop all
              Blacklist all Linux capabilities.

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

       memory-deny-write-execute
              Install  a  seccomp  filter to block attempts to create memory mappings that are both writable and
              executable, to change mappings to be executable or to create executable shared memory.

       nonewprivs
              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.

       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.

       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, packet and bluetooth.

       seccomp
              Enable seccomp filter and blacklist the syscalls in the default list. See man 1 firejail for  more
              details.

       seccomp.32
              Enable  seccomp filter and blacklist the syscalls in the default list for 32 bit system calls on a
              64 bit architecture system.

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

       seccomp.32 syscall,syscall,syscall
              Enable seccomp filter and blacklist the system calls in the list on top of default seccomp  filter
              for 32 bit system calls on a 64 bit architecture system.

       seccomp.block-secondary
              Enable seccomp filter and filter system call architectures so that only the native architecture is
              allowed.

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

       seccomp.32.drop syscall,syscall,syscall
              Enable  seccomp  filter and blacklist the system calls in the list for 32 bit system calls on a 64
              bit architecture system.

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

       seccomp.32.keep syscall,syscall,syscall
              Enable seccomp filter and whitelist the system calls in the list for 32 bit system calls on  a  64
              bit architecture system.

       seccomp-error-action kill | log | ERRNO
              Return  a different error instead of EPERM to the process, kill it when an attempt is made to call
              a blocked system call, or allow but log the attempt.

       x11    Enable X11 sandboxing.

       x11 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.

       x11 xephyr
              Enable X11 sandboxing with Xephyr server.

       x11 xorg
              Enable X11 sandboxing with X11 security extension.

       x11 xpra
              Enable X11 sandboxing with Xpra server.

       x11 xvfb
              Enable X11 sandboxing with Xvfb server.

       xephyr-screen WIDTHxHEIGHT
              Set screen size for x11 xephyr. This command should be included in the  profile  file  before  x11
              xephyr command.

              Example:

              xephyr-screen 640x480
              x11 xephyr

DBus filtering

       Access  to  the session and system DBus UNIX sockets can be allowed, filtered or disabled. To disable the
       abstract sockets (and force applications to use the filtered UNIX socket) you would need to request a new
       network namespace using --net command. Another option is to remove unix from the --protocol set.

       Filtering requires installing the xdg-dbus-proxy utility. Filter rules can be  specified  for  well-known
       DBus names, but they are also propagated to the owning unique name, too. The permissions are "sticky" and
       are  kept  even  if  the  corresponding well-known name is released (however, applications rarely release
       well-known names in practice). Names may have a .* suffix to match all names underneath  them,  including
       themselves  (e.g. "foo.bar.*" matches "foo.bar", "foo.bar.baz" and "foo.bar.baz.quux", but not "foobar").
       For more information, see xdg-dbus-proxy(1).

       Examples:

       dbus-system filter
              Enable filtered access to the system DBus. Filters can be specified with the dbus-system.talk  and
              dbus-system.own commands.

       dbus-system none
              Disable access to the system DBus. Once access is disabled, it cannot be relaxed to filtering.

       dbus-system.own org.gnome.ghex.*
              Allow  the  application  to  own the name org.gnome.ghex and all names underneath in on the system
              DBus.

       dbus-system.talk org.freedesktop.Notifications
              Allow the application to talk to the name org.freedesktop.Notifications on the system DBus.

       dbus-system.see org.freedesktop.Notifications
              Allow the application to see but not talk to the name org.freedesktop.Notifications on the  system
              DBus.

       dbus-system.call
       org.freedesktop.Notifications=org.freedesktop.Notifications.*@/org/freedesktop/Notifications
              Allow the application to call methods of the interface org.freedesktop.Notifications of the object
              exposed   at   the   path  /org/freedesktop/Notifications  by  the  client  owning  the  bus  name
              org.freedesktop.Notifications on the system DBus.

       dbus-system.broadcast
       org.freedesktop.Notifications=org.freedesktop.Notifications.*@/org/freedesktop/Notifications
              Allow   the   application   to   receive   broadcast    signals    from    the    the    interface
              org.freedesktop.Notifications  of the object exposed at the path /org/freedesktop/Notifications by
              the client owning the bus name org.freedesktop.Notifications on the system DBus.

       dbus-user filter
              Enable filtered access to the session DBus. Filters can be specified with the  dbus-user.talk  and
              dbus-user.own commands.

       dbus-user none
              Disable access to the session DBus. Once access is disabled, it cannot be relaxed to filtering.

       dbus-user.own org.gnome.ghex.*
              Allow  the  application  to own the name org.gnome.ghex and all names underneath in on the session
              DBus.

       dbus-user.talk org.freedesktop.Notifications
              Allow the application to talk to the name org.freedesktop.Notifications on the session DBus.

       dbus-user.see org.freedesktop.Notifications
              Allow the application to see but not talk to the name org.freedesktop.Notifications on the session
              DBus.

       dbus-user.call
       org.freedesktop.Notifications=org.freedesktop.Notifications.*@/org/freedesktop/Notifications
              Allow the application to call methods of the interface org.freedesktop.Notifications of the object
              exposed  at  the  path  /org/freedesktop/Notifications  by  the  client  owning   the   bus   name
              org.freedesktop.Notifications on the session DBus.

       dbus-user.broadcast
       org.freedesktop.Notifications=org.freedesktop.Notifications.*@/org/freedesktop/Notifications
              Allow    the    application    to    receive    broadcast   signals   from   the   the   interface
              org.freedesktop.Notifications of the object exposed at the path /org/freedesktop/Notifications  by
              the client owning the bus name org.freedesktop.Notifications on the session DBus.

       nodbus (deprecated)
              Disable D-Bus access (both system and session buses). Equivalent to dbus-system none and dbus-user
              none.

       Individual filters can be overridden via the --ignore command. Supposing a profile has
              [...]
              dbus-user filter
              dbus-user.own org.mozilla.firefox.*
              dbus-user.talk org.freedesktop.Notifications
              dbus-system none
              [...]

              and  the user wants to disable notifications, this can be achieved by putting the below in a local
              override file:
              [...]
              ignore dbus-user.talk org.freedesktop.Notifications
              [...]

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 ulimit command. cpu command
       configures the CPU cores available, and cgroup command place the sandbox in an existing control group.

       Examples:

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

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

       nice -5
              Set a nice value of -5 to all processes running inside the sandbox.

       rlimit-as 123456789012
              Set the maximum size of the process's virtual memory to 123456789012 bytes.

       rlimit-cpu 123
              Set the maximum CPU time in seconds.

       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.

       timeout hh:mm:ss
              Kill  the  sandbox  automatically  after  the  time  has  elapsed.  The  time  is   specified   in
              hours/minutes/seconds format.

User Environment

       allusers
              All  user  home  directories  are  visible  inside the sandbox. By default, only current user home
              directory is visible.

       env name=value
              Set environment variable. Examples:

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

       ipc-namespace
              Enable IPC namespace.

       name sandboxname
              Set sandbox name. Example:

              name browser

       no3d   Disable 3D hardware acceleration.

       noautopulse (deprecated)
              See keep-config-pulse.

       nodvd  Disable DVD and audio CD devices.

       nogroups
              Disable supplementary user groups

       noinput
              Disable input devices.

       nosound
              Disable sound system.

       notv   Disable DVB (Digital Video Broadcasting) TV devices.

       nou2f  Disable U2F devices.

       novideo
              Disable video capture devices.

       shell none
              Run the program directly, without a shell.

Networking

       Networking features available in profile files.

       defaultgw address
              Use this address as default gateway in the new network namespace.

       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.

       hosts-file file
              Use file as /etc/hosts.

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

              Example:
              net eth0
              ip 10.10.20.56

       ip 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.

              Example:
              net eth0
              ip none

       ip dhcp
              Acquire an IP address and default gateway for the last interface defined by a net command, as well
              as set the DNS servers according to the DHCP response.  This command  requires  the  ISC  dhclient
              DHCP client to be installed and will start it automatically inside the sandbox.

              Example:
              net br0
              ip dhcp

              This  command  should not be used in conjunction with the dns command if the DHCP server is set to
              configure DNS servers for the  clients,  because  the  manually  specified  DNS  servers  will  be
              overwritten.

              The  DHCP client will NOT release the DHCP lease when the sandbox terminates.  If your DHCP server
              requires leases to be explicitly released, consider running a DHCP client and releasing the  lease
              manually in conjunction with the net none command.

       ip6 address
              Assign IPv6 addresses to the last network interface defined by a net command.

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

       ip6 dhcp
              Acquire  an  IPv6  address and default gateway for the last interface defined by a net command, as
              well as set the DNS servers according to  the  DHCP  response.   This  command  requires  the  ISC
              dhclient DHCP client to be installed and will start it automatically inside the sandbox.

              Example:
              net br0
              ip6 dhcp

              This  command  should not be used in conjunction with the dns command if the DHCP server is set to
              configure DNS servers for the  clients,  because  the  manually  specified  DNS  servers  will  be
              overwritten.

              The  DHCP client will NOT release the DHCP lease when the sandbox terminates.  If your DHCP server
              requires leases to be explicitly released, consider running a DHCP client and releasing the  lease
              manually.

       iprange 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.

              Example:

              net eth0
              iprange 192.168.1.150,192.168.1.160

       mac address
              Assign MAC addresses to the last network interface defined by a net command.

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

       mtu number
              Assign a MTU value to the last network interface defined by a net command.

       net 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.

       net ethernet_interface|wireless_interface
              Enable  a new network namespace and connect it to this ethernet interface using the standard Linux
              macvlan or ipvlan 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.

       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.

       net tap_interface
              Enable  a  new  network namespace and connect it to this ethernet tap interface using the standard
              Linux macvlan driver.  If the tap interface is  not  configured,  the  sandbox  will  not  try  to
              configure  the  interface inside the sandbox.  Please use ip, netmask and defaultgw to specify the
              configuration.

       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.

       netmask address
              Use this option when you want to assign an IP address in a new namespace and the parent  interface
              specified  by --net is not configured. An IP address and a default gateway address also have to be
              added.

       netns namespace
              Run the program in a named, persistent network namespace. These  can  be  created  and  configured
              using "ip netns".

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

Other

       deterministic-exit-code
              Always exit firejail with the first child's exit status. The default behavior is to use  the  exit
              status of the final child to exit, which can be nondeterministic.

       join-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".

FILES

       /etc/firejail/appname.profile
              Global Firejail configuration consisting mainly of profiles  for  each  application  supported  by
              default.

       $HOME/.config/firejail/appname.profile
              User application profiles, will take precedence over the global profiles.

       /usr/share/doc/firejail/profile.template
              Template for building new profiles.

       /usr/share/doc/firejail/redirect_alias-profile.template
              Template for aliasing/redirecting profiles.

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: https://firejail.wordpress.com

SEE ALSO

       firejail(1), firemon(1), firecfg(1), firejail-login(5), firejail-users(5), jailcheck(1)

       https://github.com/netblue30/firejail/wiki/Creating-Profiles

0.9.66                                              Aug 2021                                 FIREJAIL-PROFILE(5)