网关是企业网络连接到另一个网络的关口,企业所有与外界的网络交流都要流经这个关口。网关就像是一扇大门,一旦大门敞开,企业的整个网络信息就会暴露无遗。从安全角度来看,对网关的防护得当,就能起到“一夫当关,万夫莫开”的作用,反之,病毒和恶意代码就会从网关进入企业内部网, Gateway is the gateway to connect the enterprise network to another network, corporate network with the outside world have to flow through this gateway. Gateway is like a gate, once the door open, the entire network of business information will be exposed. From a security point of view, proper protection of the gateway can play the role of “one off, one thousand off”, on the contrary, viruses and malicious code from the gateway into the intranet,