IC697MSC802

IC697MSC802

IC697MSC802

所提方案可针对如下几种攻击的应对。恶意代码攻击: 利用数控网络系统的硬件、软件、协议漏洞进行恶意代码攻击。在综合防护体系中，部署在外网和内网恶意代码检测机制可检测恶意攻击，可信访问监控可发现通过移动存储设备的入侵，可信虚拟防护域基于完整性的访问控制需求可阻断恶意代码攻击，并预警或启动自治愈修复。未授权访问: 首先由安全隔离设备进行初步隔离，可信数据防护机制进行拒绝访问操作，并提交审计服务器。信息泄露: 主要是内部网络信息泄露，可依靠可信数据隔离环境、敏感数据安全保护域、对数据读写的认证来防护。根据操作日志，进行审计。拒绝服务攻击: 主要针对 DNC 数控网
络中的系统服务器、DNC 传输服务器、接口交换机进行攻击，使之不能正常工作或缓冲区溢出。综合防护方案中主要通过协议检测监控访问流量，通过可信计算平台阻止非可信访问请求。一旦数控机床出现故障，启动自治愈机制中的冗余机制，保证可用性，同时利用自检机制恢复故障。防护方案协同性: 当面临各种攻击时，综合利用可信防护、数据和系统基础防护、自治愈防护，协同防护数控系统。

  (1) 防护方案的时间协同。可信防护用于事前监控，实现可信访问控制; 自治愈机制用于事后容错恢复; 基础数据安全防护配合可信数据防护，用于事中主动数据访问控制; 基础系统安全防护配合可信防护，
对可信防护拒绝进程进行入侵检测，收集攻击证据，用于事后审计。在攻击威胁到数控系统可用性时，启动自治愈容错恢复机制。

  (2) 防护方案的空间协同。所提方案充分利用数控网络架构不同资源属性来部署防护技术，数控机床网络实时性要求高，采用可信虚拟域隔离机制防止非授权访问，并把针对数控机床的入侵防护机制部署在数控网络中。一旦突破所有防护措施，启动自治愈机制，隔离修复受损设备。在DNC数控网络中，部署可信平台、入侵防御监控平台，确保核心控制系统安全性。在办公网中部署复杂可信网络、入侵检测、恶意代码检测等措施，确保外围网络可靠性。

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