RESUMO
Under the guidance of national policies on Internet medical services, the scope of medical information services provided by the hospital information system is growing all the way, the interaction with external information is more and more frequent, and the network security risk is higher and higher. The authors analyzed the business types of the hospital′s external information service, the way to connect with the external network and the existing network security problems.Following the principles of information system security level protection 2.0, the authors built a unified extranet secure channel for the hospital under the principles of top-level design, formed an all-round network security protective barrier with strict management measures and technical means, then ensured the stable operation of hospital information system and data security.