在信息化的建设过程中,为了保证政府网络与信息的安全,国家保密局规定涉密系统的内网必须与外网隔离。然而,公共互联网是一个巨大的信息资源宝库,政府的大量信息和数据都需要从中获得,而且随着政务公开政府上网工程的开展,很多政府部门的对外业务服务也都迁移到了互联网上。如何解决内网安全的基础上,实现内外数据的交换是本文讨论的重点。 In the process of building informationization, in order to ensure the security of government networks and information, the State Secrets Bureau stipulates that the intranet of the classified system must be isolated from the external network. However, the public Internet is a tremendous treasure trove of information resources, and a large amount of government information and data needs to be obtained. With the open administration of the government, the external business services of many government departments have also been migrated to the Internet. How to solve the internal network security on the basis of achieving internal and external data exchange is the focus of this article.