I think you overestimate what iptables can do and for what they are used today. Most of the DDoS filtering is done using XDP, BPF, not iptables. Articles you li

I think you overestimate what iptables can do and for what they are used today. Most of the DDoS filtering is done using XDP, BPF, not iptables. Articles you linked contradict your thesis. In first article they write there about iptables but they use XDP most of the time because it's a better/more efficient solution. In second article they are using iptables for routing, not preventing DDoS.