Zone-based firewall was re-added, but op-mode commands were not included.
vyos@1.4.0-rc1:~$ show firewall Possible completions: <Enter> Execute the current command bridge Show bridge firewall group Show firewall group ipv4 Show IPv4 firewall ipv6 Show IPv6 firewall statistics Show statistics of firewall application summary Show summary of firewall application vyos@1.4.0-rc1:~$ show zo Invalid command: show [zo] vyos@1.4.0-rc1:~$ show zo
In older version:
vyos@vyos:~$ show zone-policy Possible completions: <Enter> Execute the current command zone Show summary of zone policy for a specific zone vyos@vyos:~$ show zone-policy zone Possible completions: <text> Show summary of zone policy for a specific zone vyos@vyos:~$ show zone-policy zone