防火墙是一种成熟有效的网络安全防护技术,通常应用在隔离Internet区域与安全局域网的风险,而且不会妨碍对风险区域的正常访问。从部署位置来看,防火墙往往位于网络出口,是内部网和外部网之间的唯一通道,因此提高防火墙的性能、避免其成为瓶颈,就成为防火墙能否成功的一个关键问题。 Firewalls are sophisticated and effective techniques for network security that are generally used to isolate Internet and security LANs without interfering with normal access to risky areas. From the deployment point of view, the firewall is often located at the egress of the network, which is the only channel between the intranet and the extranet. Therefore, improving the performance of the firewall and preventing it from becoming a bottleneck becomes a key issue for the success of the firewall.