网关过滤技术详解（Gateway filtering technology）.doc

网关过滤技术详解（Gateway filtering technology） Gateway filtering technology Font size: large, medium, small, 2009-05-22, 10:54:51, source: 51CTO.com As you all know, walking from room to room is bound to pass through a door. Similarly, the transmission of information from one network to another must also pass through a gateway which is the gateway. As the name suggests, a gateway (Gateway) is a gateway to a network that connects to another network. The gateway (Gateway) is also called inter network connector and protocol converter. Gateway is the most complex network interconnection device for network interconnection on the transport layer. It is only used for interconnection of two high level protocols with different networks. Gateways can be used either for WAN interconnection or for LAN interconnection. It is a computer system or device that acts as a transfer task. At the same time, gateways can also provide filtering and security features. Take appropriate technical measures, to filter bad information on the Internet, not only can prevent the adverse information against the people, to meet the needs of social ideology, through the Internet user behavior, improve work efficiency, reasonable use of cyber source, reduce the harm of virus on the network, this is the fundamental connotation of gateway filtering technology. Therefore, a new technology, gateway filtering technology, has been bred and attracted peoples attention. LanGateUTM is a hardware device with gateway filtering function. It can filter and control the Internet behavior of LAN computers only in the gateway position. It can effectively monitor, control and record internal computer activities on the Internet, all receiving real-time recording of LAN computer email, browse the web, and users to monitor and manage the network chat, control network to access the specified cyber source or network protocol. LanGateUTM system uses the latest network security technology, which can accurately and effectively monitor