stateful inspection firewall

基本解释

The final work is to design and make a firewall based on Stateful Packet inspection.
最后设计和实现了基于全状态检测的防火墙。
The stateful packet inspection firewall offers protection against denial of service attacks while optimizing network traffic.
状态包检测防火墙提供保护、防范拒绝服务攻击，同时优化网络的流量。
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Stateful inspection firewall reads, analyzes and uses total information in network connection, including communication information, communication states, application states and operation information.
状态检测技术防火墙读取、分析和利用了全面的网络通信信息和状态，包括：通信信息、通信状态、应用状态和操作信息。

My question to Richard would be, what Critical or High Risk does a port-based, stateful inspection firewall mitigate?
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