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IPv4 Firewall not working - what am I missing?

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Hello all!
I am using Proxmox since v3 but have not used its Firewall yet. For now I just want to restrict access to my Proxmox node not my VMs. I have enabled firewall in datacenter (with ACCEPT for input and output policy) and on the node itself. Then I have put in a simple rule to drop icmp packets. However when I ping the host I still get response. What am I missing here?

Code:
root@sproxmox:/etc/pve/firewall# cat cluster.fw
[OPTIONS]

enable: 1
policy_in: ACCEPT...

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