| This paper first gives an analysis of the important impact caused by directory technology on the development of IP network management, then proposes a scheme of IP network user management in which directory service plays a core role, and explains the implementation of a LDAP based campus network user management system: Justnet. Justnet is implemented on the Linux platform and mainly consists of LDAP service, DHCP service, control gateway, user login client and web based administration tools. A variety of measures have been taken to ensure the security and availability of the system. This system, which stores user account data and some service configurations in a LDAP directory, can perform TCP/IP host configuration and apply proper access control according to user identity and administrator-defined policies. |