The Study in Defending Worm Virus in Local Area Network

Worms is a virus that could critically threat to LAN.In order to solve the problem of worms flooding in middle scale LAN,the LAN in an institute is studied.Based on the analyses of the situation of the present campus network as well as the related theories,a security scheme is researched and designed both from the theoretical and practical perspectives in combination with the Three phase security improvement project in the LAN.Adding a charging gateway in combination with leak scanning and net flow monitoring technology is proposed.The scheme intends to solve the problems in several aspects:patching operation system,scanning serious leak,promoting computers that have serious leaks,and fighting against worms.It is able to suspend the Internet-visiting qualification on computers which have been infected by worms until such worms are cleared.It is able to notify the users who have some serious leaks in their operation systems or have not patched their operation systems in time in login page of the charging gateway.