SCADA and industrial protocols.MODBUS/TCP,EtherNet/IP,and DNP3 are widely used in industrial control systems,but these protocols are not designed with a secure encryption mechanism,and usually do not require any authentication to remotely execute commands to a control device.These protocols should only be allowed to transmit unidirectionally on the control network,and not allowed to penetrate into the control network on the office network.Industrial firewalls or security routers that can complete this function are usually deployed on I/O devices and controllers with Ethernet interfaces,so as to avoid virus attacks or broadcast storms caused by device networking,and to avoid various subsystems virus attack and interference.
SCADA和工业协议。MODBUS/TCP、EtherNet/IP和DNP3等在工业控制系统中被大量使用，但是这些协议在设计时没有安全加密机制，通常也不会要求任何认证便可以在远程对一个控制装置执行命令。这些协议应该只被允许在控制网络单向传输，不准许在办公网络穿透到控制网络。能够完成这一功能的工业防火墙或者安全路由器，通常被部署在具有以太网接口的I/O设备和控制器上，从而避免因设备联网而造成的病毒攻击或广播风暴，还可以避免各子系统间的病毒攻击和干扰。
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