Public bug reported:
In a clean Ubuntu 19.04 (disco) VM installation, firewalld fails to
start:
* firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/lib/systemd/system/firewalld.service; enabled; vendor
preset: enabled)
Active: inactive (dead) since Wed 2019-04-24 06:35:00 EDT; 3min 58s ago
Docs: man:firewalld(1)
Process: 516 ExecStart=/usr/sbin/firewalld --nofork --nopid (code=exited,
status=0/SUCCESS)
Main PID: 516 (code=exited, status=0/SUCCESS)
Apr 24 06:34:58 ibm-p8-kvm-03-guest-02 systemd[1]: Starting firewalld - dynamic
firewall daemon...
Apr 24 06:34:59 ibm-p8-kvm-03-guest-02 systemd[1]: Started firewalld - dynamic
firewall daemon.
Apr 24 06:34:59 ibm-p8-kvm-03-guest-02 firewalld[516]: WARNING:
iptables-restore and iptables are missing, disabling IPv4 firewall.
Apr 24 06:34:59 ibm-p8-kvm-03-guest-02 firewalld[516]: WARNING:
ip6tables-restore and ip6tables are missing, disabling IPv6 firewall.
Apr 24 06:35:00 ibm-p8-kvm-03-guest-02 firewalld[516]: FATAL ERROR: No IPv4 and
IPv6 firewall.
Apr 24 06:35:00 ibm-p8-kvm-03-guest-02 firewalld[516]: ERROR: Raising
SystemExit in run_server
Apr 24 06:35:00 ibm-p8-kvm-03-guest-02 systemd[1]: firewalld.service: Succeeded.
This is with the default iptables backend. When switching to
FirewallBackend=nftables, firewalld at least starts up, even though it
shows warnings:
* firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/lib/systemd/system/firewalld.service; enabled; vendor
preset: enabled)
Active: active (running) since Wed 2019-04-24 06:40:14 EDT; 2s ago
Docs: man:firewalld(1)
Main PID: 501 (firewalld)
Tasks: 2 (limit: 2306)
Memory: 33.0M
CGroup: /system.slice/firewalld.service
`-501 /usr/bin/python3 /usr/sbin/firewalld --nofork --nopid
Apr 24 06:40:15 ibm-p8-kvm-03-guest-02 firewalld[501]: WARNING: COMMAND_FAILED:
UNKNOWN_ERROR: 'ip4tables' backend does not exist
Apr 24 06:40:15 ibm-p8-kvm-03-guest-02 firewalld[501]: WARNING: COMMAND_FAILED:
UNKNOWN_ERROR: 'ip4tables' backend does not exist
and doesn't actually work:
# firewall-cmd --state
failed
ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: firewalld 0.6.3-5ubuntu4
Architecture: amd64
** Affects: firewalld (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1826187
Title:
firewalld fails to start: FATAL ERROR: No IPv4 and IPv6 firewall.
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