A shell function for macOS that allows mosh-server to send/receive traffic without having to deactivate the firewall

fix_mosh_server.sh

# Mosh Server on macOS Mojave is blocked by the packet filter.
# Modifying the pf.conf for pfctl is not enough to make it work.
# The following function does, however, seem to allow the necessary
# traffic to pass through the firewall

fix_mosh_server() {                                                                                                                           ✔  10037  13:10:10
  local fw='/usr/libexec/ApplicationFirewall/socketfilterfw'
  local mosh_sym="$(which mosh-server)"
  local mosh_abs="$(greadlink -f $mosh_sym)"

  sudo "$fw" --setglobalstate off
  sudo "$fw" --add "$mosh_sym"
  sudo "$fw" --unblockapp "$mosh_sym"
  sudo "$fw" --add "$mosh_abs"
  sudo "$fw" --unblockapp "$mosh_abs"
  sudo "$fw" --setglobalstate on
}