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Avocent CCM1640, CCM840 Enabling plain text Telnet and SSH connections, To display SSH information:, To enable SSH session access to the CCM:

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26CCM840/1640 Installer/User Guide

To enable SSH session access to the CCM:

1.Issue a Show Server Security command to ensure that you are using an authentication method other than None.

SHOW SERVER SECURITY

2.Issue a Server SSH command with the Enable parameter. You may also specify an authentication method.

SERVER SSH ENABLE AUTH=<auth>

If an authentication method is not speciﬁed, the previous authentication parameter will be used. The default value is AUTH=PW.

3.If you are enabling SSH for the ﬁrst time, you are advised that all other CCM sessions will be terminated. Enter Y to continue or N to cancel.

4.If you are reenabling SSH, you are prompted to use the existing SSH server key or generate a new key. Enter Y to use the existing key or N to generate a new key.

For more information, see Server SSH command in Chapter 5.

To disable SSH session access to the CCM:

Issue a Server SSH command with the Disable parameter.

SERVER SSH DISABLE

When SSH is disabled, the CCM operates in plain text mode.

To display SSH information:

Issue a Show Server Security command.

SHOW SERVER SECURITY

If SSH is enabled, the display will include SSH2. Regardless of whether SSH is enabled, the display will indicate the authentication method that was speciﬁed with the Server SSH command.

Enabling plain text Telnet and SSH connections

Plain text (non-encrypted) Telnet connections are enabled by default.

If you enable SSH connections using the Server Security command and the Encrypt=SSH parameter, plain text Telnet connections will be disabled. However, if you enable SSH connections with the Server SSH command, both plain text and SSH connections will be allowed.

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