[SOLVED] Firewall stopped working

[ixproxmox]

Fixed: Didn't want to, but did a reboot just in hope and it worked afterwards. Don't know why.

Firewall has started failing and I don't know why. I get this error in the log:

Apr 29 00:16:17 pve-firewall[1442]: status update error: ipset_restore_cmdlist: Try `ipset help' for more information.

I have run pve-firewall start and it doesn't give any error.

I suspect some config has gotten wrong from long time ago, perhaps when trying to stop ipv6. Or something random. It is a long time since I dealt with this.

pve-firewall status
Status: enabled/running (pending changes)

Where can I investigate this fast?

 

[ixproxmox]

Only issue now is that most of my LXC containers doesn't work any more.. Console doest say anything, just black and shows status Running - without actually running. I can't even stop them

I can pct mount 102 for instance... So weird.

And that was apparently the cgroup issue, haven't rebooted the system in a long time since it runs important stuff that doesn't update that often..

Added it to grub:
systemd.unified_cgroup_hierarchy=0 and ran grub-update.. reboot. Fixed.