3Com Router 3000 Ethernet FamilyConfiguration Guide Chapter 7 User Management3Com Corporation7-1Chapter 7 User Management7.1 User Management OverviewA router is not configured with a user password when it is powered on for the first time.In that condition, any user can perform configuration on the router as long asconnecting his PC with the router via a Console port. The remote user can also accessthe router via Telnet if the router has been configured with IP address of MainProcessing Unit (MPU) or the interface board, and it is possible for the remote user toaccess the network by establishing PPP connection with the router. To ensure thenetwork security, it is necessary to configure a user and user password for the router tofacilitate the management of the user.Note:This chapter focuses on the authentication management over terminal users andTelnet users. Refer to the Security module in V 2.41 Operation Manual for other usertypes and AAA RADIUS/HWTACACS authentication.7.1.1 User ClassificationAccording to the service for a user, the user of a router can be classified into thefollowing types:z HyperTerminal user, accessing the router via a Console port or AUX port;z Telnet user, accessing the router via Telnet command;z FTP user, establishing FTP connection with the router to transmit packets;z PPP user, establishing PPP connections (such as dialing and PPPoA) with therouter to access the network.z SSH user, establishing SSH connection to log into the router;z PAD user, establishing PAD connection with the router to access the network.A user can have several services at the same time. In this way, only one user canexecute multiple functions.7.1.2 User PriorityThe system manages HyperTerminal and Telnet users hierarchically. According to thishierarchy, users are sorted into four levels: visit, monitor, system and manage,identified by 0 through 3. After users at different levels log in, they can only use
