I can confirm that this bug also affects *some* of our desktops running 18.04. I haven't figured out why it didn't affect all (100+) machines.
Here is the status output of firewalld service running on a hostname
'matht335':
```
# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/lib/systemd/system/firewalld.service; enabled; vendor
preset: enabled)
Active: active (running) since Mon 2019-11-18 09:39:43 AEDT; 23min ago
Docs: man:firewalld(1)
Main PID: 1340 (firewalld)
Tasks: 2 (limit: 4915)
CGroup: /system.slice/firewalld.service
└─1340 /usr/bin/python3 -Es /usr/sbin/firewalld --nofork --nopid
Nov 18 09:39:43 matht335 systemd[1]: Starting firewalld - dynamic firewall
daemon...
Nov 18 09:39:43 matht335 systemd[1]: Started firewalld - dynamic firewall
daemon.
Nov 18 09:39:44 matht335 firewalld[1340]: WARNING: '/sbin/iptables-restore
--wait=2 -n' failed: /sbin/iptables-restore: unrecognized option '--wait=2'
iptables-restore: line 46 failed
Nov 18 09:39:44 matht335 firewalld[1340]: ERROR: COMMAND_FAILED
Nov 18 09:39:48 matht335 firewalld[1340]: WARNING: '/sbin/iptables-restore
--wait=2 -n' failed: /sbin/iptables-restore: unrecognized option '--wait=2'
iptables-restore v1.6.1: goto
'IN_public' is not a chain
Error occurred at line: 2
Try `iptables-restore -h' or
'iptables-restore --help' for more information.
Nov 18 09:39:48 matht335 firewalld[1340]: WARNING: '/sbin/ip6tables-restore
--wait=2 -n' failed: /sbin/ip6tables-restore: unrecognized option '--wait=
ip6tables-restore v1.6.1: goto
'IN_public' is not a chain
Error occurred at line: 2
Try `ip6tables-restore -h' or
'ip6tables-restore --help' for more information.
Nov 18 09:39:48 matht335 firewalld[1340]: ERROR: COMMAND_FAILED
```
itables version:
1.6.1-2ubuntu2
firewalld version:
0.4.4.6-1
--
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1835188
Title:
firewalld attempts to use parameter that requires a newer iptables
version
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https://bugs.launchpad.net/ubuntu/+source/firewalld/+bug/1835188/+subscriptions
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