As you know, Internet nowadays bases on the IPv4 protocol, which has some imperfect. IPv6 will be the necessary developed current in the future, as is the new thought of designing firewall systems.

• Internet网络现在所采用的是IPv4协议，但由于IPv4协议存在着这样和那样的缺点，IPV6协议已经成为未来网络协议发展的必然趋势，这也为设计防火墙系统提供了一个新思路。