Abstract: This paper proposes the research of the security situational awareness system, aiming at solving the risk existed in the LAN and the bottleneck problem of United Threat Management(UTM). For the first time, it brings forward security situational awareness system architecture in the LAN combining UTM. The main security index is acquired through the DEMATEL method and the situational measurement model is built by adopting the fuzzy comprehensive evaluation algorithm. The threat measurement model is constructed to compute the threat degree in the LAN based on the security index and situational measurement model. The result proves that the system can analyze the security situation accurately and make the UTM strengthen the network security.
fuzzy comprehensive evaluation,
United Threat Management(UTM),
Markov prediction model