防火墙是维持网络安全的重要环节,不仅可以起到阻碍、抑制的作用,还可以查杀隐含危险的组件,防火墙对网络的运行具备安全保护作用。虽然防火墙的发展逐渐升级,但是实际仍存在无法避免的缺陷,威胁网络环境,形成安全隐患,因此,文章通过对防火墙技术进行研究,分析其在网络安全中的作用以及重要性。 Firewalls are an important part of maintaining network security. They not only serve as an impediment and a deterrent, but also eliminate potentially dangerous components. Firewalls provide security for network operations. Although the development of the firewall is gradually escalated, there are still some unavoidable defects in actuality, threatening the network environment and creating potential security risks. Therefore, the article studies the firewall technology and analyzes its function and importance in network security.