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Comment by dotancohen

8 months ago

Sell it to us! Why do you use specifically firejail?

There are so many options, from so many different security perspectives, that analysis paralysis is a real issue.

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dotancohen

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johnisgood  8 months ago

I feel like I should keep track of all my comments on HN because I remember writing a lengthy comment on firejail more than once. I cannot keep doing this. :D

For user-space, there is usually bubblewrap vs. firejail. I have not personally used bubblewrap, so I cannot comment on that, but firejail is great at what it does.

The last comment was about restricting clipboard access to either X11 or Wayland which is possible with firejail quite easily, so if you want that, you can have that.

You can do a LOT more with firejail though.

https://wiki.archlinux.org/title/Firejail

https://man.archlinux.org/man/firejail.1

  • lioeters  8 months ago

    > bubblewrap vs. firejail

    In case anyone else is curious, I found the following comparison in bubblewrap's repo.

    - https://github.com/containers/bubblewrap#related-project-com...

    I'm gonna try both and see which one I like. Thanks for this info! You're sure living up to your user name there. (:

    • johnisgood  8 months ago

      To comment on the Pulseaudio bit from the link: you will want "keep-config-pulse" and "whitelist ${HOME}/.config/pulse/*".

      > You're sure living up to your user name there. (:

      You are too kind, thank you!

  • rufugee  8 months ago

    So do you configure firejail to give each app their own separate, permanent home directories? Like "firejail --private=/home/user/firejails/discord discord", "firejail --private=/home/user/firejails/chromium chromium", and so on?

    • johnisgood  8 months ago

      I have my own Discord.profile!

      This is my ~/.config/firejail/Discord.profile[1]:

        include disable-common.inc
  include disable-devel.inc
  include disable-interpreters.inc
  include disable-shell.inc

  noblacklist /sys/fs
  noblacklist /sys/module

  keep-config-pulse
  keep-dev-shm

  name discord
  apparmor
  caps.drop all
  caps.keep sys_admin,sys_chroot
  netfilter
  nodvd
  #nogroups
  #noinput
  nonewprivs
  noroot
  notv
  #nou2f
  #novideo
  protocol unix,inet,inet6
  #shell none

  disable-mnt
  private-cache
  #private-tmp

  noexec /tmp

  dbus-user filter
  dbus-user.talk org.freedesktop.Notifications

  private-bin Discord,cut,echo,egrep,electron,electron[0-9],electron[0-9][0-9],grep,head,sed,sh,tr,xdg-mime,xdg-open,zsh,gzip,wget,curl,notify-send
  private-etc alternatives,asound.conf,ca-certificates,crypto-policies,fonts,group,ld.so.cache,ld.so.preload,localtime,login.defs,machine-id,password,pki,pulse,resolv.conf,ssl

  noblacklist /usr/lib/discord/
  whitelist ${HOME}/.config/discord
  read-write ${HOME}/.config/discord
  whitelist ${DOWNLOADS}
  whitelist ${HOME}/.config/pulse/*

  include whitelist-common.inc
  include whitelist-var-common.inc
  include whitelist-run-common.inc
  include whitelist-runuser-common.inc

      I have some things commented out but you could probably uncomment most.

      Some has this, too:

        disable-mnt
  private-dev
  private-cache

  env http_proxy=socks5://127.0.0.1:9050
  env https_proxy=socks5://127.0.0.1:9050

      FWIW, once you start whitelisting, it will only have access to those directories and files only, so Discord has no access to anything other than its own directory and ${DOWNLOADS}, which I should probably change.

      You should check out the default profiles for many programs / apps under directory "/etc/firejail".

      [1] You run it via "firejail Discord" or "firejail ./Discord" if you name it "Discord.profile".

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