计算机网络的不断发展,加快了我国企事业单位和全社会信息化的脚步,同时网络安全问题已成为信息时代人类共同面临的挑战,网络安全问题也日益突出。防火墙在保障网络安全方面具有重要的作用。本文在介绍防火墙技术的工作原理和种类基础上,对防火墙在网络安全中的应用做出相关探讨。 The continuous development of computer networks has accelerated the pace of informatization in China’s enterprises, public institutions and the whole society. At the same time, the issue of cybersecurity has become a common challenge for all mankind in the information age. Network security issues have also become increasingly prominent. Firewall in the protection of network security has an important role. Based on the introduction of the working principle and types of firewall technology, this paper discusses the application of firewall in network security.