While they look the same, the technologies serve different purposes. iptables/ufw block requests at the VM level. So traffic flows all the way to your VM and t

While they look the same, the technologies serve different purposes. iptables/ufw block requests at the VM level. So traffic flows all the way to your VM and then your VM spends CPU cycles rejecting those packets. In contrast, these firewall technologies can block traffic at the network edge of the cloud provider. This is done by propagating rules to the edge routers.