Cisco WS-C4003 Software Guide - Page 276
Changing the Login Timer, Using Secure Shell Encryption for Telnet Sessions
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Changing the Login Timer Chapter 19 Checking Port Status and Connectivity This example shows how to Telnet from the switch to the remote host labsparc: Console> (enable) telnet labsparc Trying 172.16.10.3... Connected to labsparc. Escape character is '^]'. UNIX(r) System V Release 4.0 (labsparc) login: Changing the Login Timer The login timer is the number of minutes after which an idle session is disconnected. To change the logout timer value, perform this task in privileged mode: Task Command Change the logout timer value (a timeout value of set logout timeout 0 prevents idle sessions from being disconnected automatically). This example shows how to set the logout timer value to 10 minutes: Console> (enable) set logout 10 Sessions will be automatically logged out after 10 minutes of idle time. Console> (enable) This example shows how to set the logout timer value to 0, preventing idle sessions from being disconnected automatically: Console> (enable) set logout 0 Sessions will not be automatically logged out. Console> (enable) Using Secure Shell Encryption for Telnet Sessions Note To use the secure shell encryption(SSH) feature commands, you must be running an encryption image. Encryption commands are set crypto key rsa, clear crypto key rsa, and show crypto key. See Chapter 29, "Working with System Software Images," for the software image naming conventions used for the encryption images. The SSH feature provides security for Telnet sessions to the switch. SSH is supported for remote logins to the switch only. Telnet sessions initiated from the switch cannot be encrypted. To use this feature, you must install the application on the client accessing the switch and you must configure SSH the switch. The current implementation of SSH supports version 1, both the DES and 3DES encryption methods, and can be used with RADIUS and TACACS+ authentication. To support authentication for Telnet with secure shell encryption, use the telnet keyword in the set authentication commands. 19-6 Software Configuration Guide-Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4 78-12647-02