FBM237
解决方案
该燃气公司出于对各站库生产安全的考虑，选用了pSafetylink作为站控系统的网络安全防护装置。
pSafetylink通过内部的双独立主机系统，一端接入到站控系统的网络，通过采集接口完成对站控数据的采集；另一端接入到集团专网或通过ADSL、无线等方式接入到公网，完成数据到调度中心的传输。双主机之间通过专有的PSL网络隔离传输技术，截断TCP 连接，彻底割断穿透性的 TCP 连接。PSL的物理层采用专用隔离硬件，链路层和应用层采用私有通信协议，数据流采用128 位以上加密方式传输，更加充分保障数据安全。PSL技术实现了数据完全自我定义、自我解析、自我审查，传输机制具有彻底不可攻击性，从根本上杜绝了非法数据的通过，确保站控制系统不会受到攻击、侵入及病毒感染。
总结
pSafetylink在燃气生产指挥调度系统中，一方面实现了对各站控系统的分布式数据采集与传输，同时彻底阻断了站控系统的控制网络与互联网络的直接网络连接，从根本上保证了站控系统的网络不会受到来自外网数据的攻击，为各站库的生产安全运行提供了保障。
FBM237
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