Research on Improved Dynamic Security LAN

With rapid development of network technology, networks bring people convenience; but network security problems are also increasingly serious, especially in LAN security, which is a widely used network connection mode. According to statistics, in terms of the economic losses caused by internal staff is much higher than the invasion of outsiders. Therefore, how to prevent from insider misuse is related to one of the key issues of network security. LAN security solutions in the past are mostly the superposition of several network security technologies; there is not to solve the fundamental problem. This paper presents dynamic LAN security solutions based on ordinary PC, in cooperation with the controller and switches, real-time monitoring the operation actions of the internal personnel, dynamically changing the user´s security level to protect confidential information from disclosure. Experimental results show that this method can not only prevent a security breach within the staff, the economic costs without increasing too much, but also can solve the problem of LAN security leaks.