Warning: This change will be reverted after reboot or firewalla service restarts.
1. Login via SSH in the local network. The username is pi and the password can be found in "Advanced" -> "Configuration" -> "SSH Console"
2. Run the following command:
sudo iptables -A FW_INPUT_DROP -i $(frcc | jq -r '.routing.global.default.viaIntf') -p icmp -j FW_DROP
Note: This will disable ping from outside to WAN interfaces, it will not stop you from pinging WAN interfaces from your local LAN networks.