The paper introduces the primary principle and peculiarity of IP Multicast technology and Firewall,and then discusses the two kinds of firewall technology based on IP Multicast technology in detail.

• 首先介绍了IP组播技术的原理及其特点,然后引入防火墙技术的介绍,最后重点讨论了基于IP组播的特性的两种防火墙,并对这两种情况做了对比和总结。