SUMMARY Upgrade Kubuntu 18.10 to 19.04 and Firewalld will not start. If you do a new install of Kubuntu 19.04, then it works ok. STEPS TO REPRODUCE 1. Upgrade Kubuntu 18.10 to 19.04 2. systemctl status firewalld will display WARNING: iptables-restore and iptables are missing, disabling IPv4 firewall. FATAL ERROR no IPv4 or IPv6 firewall. OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
Please report this issue to the bugtracker of your distribution.