Securing UNIX-Based Networks

摘要

For many users and organizations, UNIX has become the operating system of choice for distributed systems, because of its networking capabilities and the availability of UNIX-based network protocols (e.g., TCP/IP). UNIX networks typically consist of workstations and one or more file servers linked together to form a local area network (LAN); these LANs may in turn be connected to other widely dispersed networks, thereby forming a wide area network (WAN). Protection of information on such networks can pose a serious challenge to security professionals. This article addresses the basic network security features available with most current versions of UNIX.