How to Configure the Firewall on Proxmox

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How to Configure the Firewall on Proxmox

In this video tutorial, we will see how to use the Firewall functionality integrated into Proxmox to secure virtual machines and manage network flows.

There are technically three types of firewall configurations that you can use on Proxmox, but they all operate the same (Datacenter, Node, or VM/Container):

- Creating rules for the Datacenter will apply to Nodes under the Datacenter, however, they will not apply to VMs or containers under the Datacenter or Node.

- Creating a firewall rule for a specific Node will not apply to the Datacenter, VMs, or Containers. Node rules will only apply to the Node individually.
Until the firewall is enabled, none of the firewall rules will apply.

As soon as the firewall is enabled, it will block all traffic by default, meaning that anything attempting to access a port that hasn’t had an allow rule created for it will be blocked!

This process is slightly confusing because there are technically three different sections where you can create Firewall rules (Datacenter, Node, VM/Container).

As soon as you understand that Nodes will inherit Datacenter rules, but VMs/Containers will not inherit Node rules, it starts to get a little easier to understand and you can begin creating the correct firewall rules.

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#firewall #pve #proxmox