基于S3C2440的网络隔离器设计与实现

介绍了一种网络隔离器的设计与实现方法。以三星公司的ARM9芯片S3C2440为载体,以SPI（串行外设接口）数据传输为手段,结合自定义数据传输协议,实现了无操作系统的网络数据隔离器。对系统的总体结构、软硬件实现方法进行了详细说明,重点介绍隔离系统的工作原理及内部工作流程,并对数据传输协议的安全性进行了研究。基于本文设计思想研制的网络隔离器,能有效过滤内部网络与外部网络之间传输的非认证数据,确保了内部网络的安全性。

Design and Implementation of a Network Isolator Based on S3C2440

＂GAP＂-a network data isolator without operating system is designed and implemented using SAMSUNG ARM9 chipset S3C2440 as its carrier and using SPI （Serial Peripheral Interface） as the means of data transmission and incorporating a self-defined data transfer protocol. System architecture and hardware and software implementation are described in detail with a highlight on the operational principle and internal workflow of the isolation system. Security of the data transfer protocol is analyzed. Isolators developed with the design approach effectively filter away non-authenticated data transferred between the internal network and the external network to ensure security of an intranet.