[PVE-User] PVE Firewall IPset+Alias broken in v8

[Patrick Velder]

Hello,

Since the upgrade to PVE 8, there appears to be a problem with the 
combination of ipset and alias. When checking the firewall status using 
the command "pve-firewall status," I receive the error message "value 
does not look like a valid IP address or CIDR network" repeated multiple 
times. Despite attempting to downgrade to pve-firewall_4.3-2_amd64.deb, 
the issue remains unresolved.

To further investigate and find a potential solution, I recommend 
checking the following forum threads:

  * https://forum.proxmox.com/threads/pve-8-pve-firewall-status-no-such-alias.130202/
  * https://forum.proxmox.com/threads/ipset-not-working-for-accepting-cluster-traffic.129599/

Is that a known issue and is there maybe a workaround, since many rules 
stopped working?

Thanks and best regards
Patrick