Configuring a cluster-specific firewall
Cluster-specific firewall options affect all the nodes and virtual machines in a cluster. There are a few tasks that should be accomplished from the Datacenter | Firewall menu:
Enabling a cluster firewall
Managing a security group
Managing IPSets
Other firewall options, such as Rules and Alias, can be configured from a host or VM Firewall option, as they have no effect on the overall operation of the cluster firewall.
Enabling a cluster firewall
In order to have the Proxmox firewall operational, it needs to be turned on at a cluster-level first.
Getting ready
Log in to the Proxmox GUI as a root or with any another administrative privilege, and then select Datacenter from the left navigation bar.
How to do it…
The following steps are used to enable a cluster-wide firewall through a GUI:
Click on Firewall from the Datacenter tabbed menu to open firewall options. The following screenshot displays the firewall status for a new Proxmox installation:
The firewall is...
