信息技术的发展使人们的生活日新月异,互联网在极大程度上方便了人们的日常生活,同时,网络病毒、网络诈骗等不安全因素也给互联网行业的发展和人们的工作生活带来危害,在这种情况下,我们必须要重视网络安全的维护,只有保证网络环境的安全性,才能使人们放心使用网络,才能使互联网产业获得持续发展。目前用于保护网络安全的措施过于单一化,已无法应对复杂多变的网络不安全因素,本文通过对如今网络安全问题的深入分析和对防火墙技术以及入侵检测技术的了解,试图利用防火墙技术和入侵检测技术的结合来提高网络防范水平,切实维护网络安全。 With the rapid development of information technology, people’s life changes rapidly. The Internet has greatly facilitated the daily life of people. At the same time, unsafe factors such as network viruses and online fraud have also brought harm to the development of the Internet industry and people’s work and life. In this case, we must pay attention to the maintenance of network security. Only by ensuring the security of the network environment can we make people rest assured that the network can be used to make the Internet industry sustainable development. At present, the measures used to protect the network security are too simplistic and can not cope with the complicated and ever-changing network insecurity. This paper tries to make use of the firewall technology and the knowledge of the firewall technology and intrusion detection technology through in-depth analysis of the current network security issues Intrusion detection technology to improve the level of network protection, and effectively safeguard the network security.