采用虚拟专用网(VPN)的隧道安全技术,结合远程控制软件,提出一种通过Internet公网对设备及监控系统进行远程维护和诊断的新方法。既保证了工厂的数据安全,又节省了网络和通信费用,还具有良好的通用性,大大促进了远程维护诊断在工程中的广泛应用。文中对该方法的关键技术、结构组成和工作机理进行了论述,结合应用实例分析指出了设计具体应用方案的原则。 Using tunnel security technology of virtual private network (VPN) and remote control software, a new method for remote maintenance and diagnosis of equipment and monitoring system through Internet public network is proposed. Not only ensure the factory data security, but also save the network and communication costs, but also has good versatility, greatly promoted the remote maintenance diagnosis in engineering widely used. The paper discusses the key technology, structure and working mechanism of the method, and points out the principle of designing a specific application scheme by combining application examples.