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Avocent CCM1640, CCM840 Using Authentication Modes, To manage a user’s access rights/level:

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Chapter 3: Operations	31

A user’s access level may be used for preemption. For example, assume User A is connected to a port. User B tries to connect to the same port. If User B has an access level equal to or greater than User A’s access level, then User B will be given the option of preempting User A.

To manage a user’s access rights/level:

1.To conﬁgure a user’s access rights/level, issue a User Add command, using the Access parameter to specify the rights or a level.

USER ADD <username> ACCESS=<access>

2.To change a user’s access rights/level, issue a User Set command, using the Access parameter to specify the rights or a level.

USER SET <username> ACCESS=<access>

3.To display the access rights and level for one or all users, issue a Show User command.

SHOW USER <username>ALL

For more information, see Managing Users in this chapter, plus User Add command, User Set command and Show User command in Chapter 5.

Using Authentication Modes

The CCM supports several methods for authenticating users: RADIUS, local and none. Multiple connection and authentication methods may operate concurrently. By default, authentication is done at the local CCM user database.

Local authentication

Local authentication uses the CCM internal user database to authenticate users.

RADIUS authentication

RADIUS authentication uses an external third-party RADIUS server containing a user database to authenticate CCM users. The CCM, functioning as a RADIUS client, sends usernames and passwords to the RADIUS server. If a username and password do not agree with equivalent information on the RADIUS server, the CCM is informed and the user is denied CCM access. If the username and password are successfully validated on the RADIUS server, the RADIUS server returns an attribute that indicates the access rights defined for that username.

To use RADIUS authentication, you must specify information about the primary RADIUS server and optionally, a secondary RADIUS server to be used as a backup.

Contents

Page Page Page Page Table of Contents Page 1 Product Overview Page Chapter 1: Product Overview Features and Benefits Safety Precautions Rack mount safety considerations Using AVWorks Page Installation and Configuration Page Chapter 2: Installation and Configuration Hardware Overview Installing the CCM Configuring the CCM Configuring the IP address and subnet mask To conﬁgure the IP address and subnet mask using a Telnet CLI: To conﬁgure the CCM using the serial CLI: Initial CCM login Reinitializing the CCM 3 Operations Page Chapter 3: Operations Overview Configuring Serial Port Settings Connecting to Serial Devices Connecting to devices using Telnet Connecting to devices from the serial CLI port Configuring and using dial-inconnections Connecting to devices using PPP Connecting to devices using SSH SSH Authentication Methods Page Enabling plain text Telnet and SSH connections Telnet CLI mode Ending device sessions Session time-outs Managing User Accounts To change a user’s conﬁguration information: To end another user’s CCM session: To delete a user: To display user conﬁguration information: Access rights and levels Using Authentication Modes Authentication summary Using Security Lock-out Managing the Port History Buffer Using port history mode commands Port History Mode Commands To access port history mode: To control the port history buffer display when you connect: To control the port history buffer content when you end a session: To clear and discard all data in a port history buffer: Managing the CCM Using SNMP To add or delete SNMP management entity addresses: To enable or disable SNMP traps: To add or delete SNMP trap destination addresses: To add, copy or delete port alert strings: To display SNMP conﬁguration information: To display port alert string information: 4 Using CCM Commands Page Chapter 4: Using CCM Commands Accessing the CLI Entering Commands When commands take effect Understanding Conventions Command syntax Page Syntax conventions Command Summary CCM Command Summary (Continued) Page Page Page 5 CCM Commands Page Chapter 5: CCM Commands Connect Command Disconnect Command Help Command Port Commands Port Alert Add command Port Alert Copy command Port Alert Delete command Port Break command Port History command Port Logout command Port Set command Page Quit Command Resume Command Server Commands Server CLI command Server FLASH command Server PPP command Server RADIUS command Server Reboot command Server Security command Server Set command Server SNMP command Server SNMP Community command Server SNMP Manager command Server SNMP Trap command Server SNMP Trap Destination command Server SSH command Show Commands Show Port command Page Show Port Alert command Show Server command Show Server CLI command Show Server PPP command Show Server RADIUS command Show Server Security command Show Server SNMP command Show User command SPC Command User Commands User Add command Page User Delete command User Logout command User Set command User Unlock command Page Appendices Page Appendices Appendix A: Technical Specifications Appendix B: Device Cabling Page RJ-45modular adaptors and cables Page Appendix C: Ports Used Appendix D: Technical Support