Mastering Proxmox - Third Edition

Configuring a host-specific firewall

Any rules created in the host zone only apply to the node where the rule itself was created and the VMs in that host node. Rules for one node do not get replicated to the other nodes, although the rule files are stored in the Proxmox cluster filesystem. There are no options to create IPSet or security groups in the host-specific firewall option. We can only create firewall rules.