What are the limitations of using the Linux terminal for DDoS mitigation compared to dedicated DDoS protection services?

The Linux terminal offers basic tools, but lacks the sophisticated capabilities of dedicated DDoS protection services. These services provide features like traffic scrubbing, global content delivery networks (CDNs), and advanced anomaly detection, which are far beyond the capabilities of `iptables` or basic monitoring scripts in the terminal. Terminal-based tools are best for initial monitoring and limited rate-limiting, not comprehensive mitigation.