SSH should replace Telnet for management connections. Telnet uses insecure plain text communications. SSH provides security for remote connections by providing strong encryption of all transmitted data between devices. In this activity, you will secure a remote switch with password encryption and SSH. Secure Passwords
Using the command prompt on PC1, Telnet to S1. The user EXEC and privileged EXEC password is cisco.
PC> telnet 10.10.10.2
Trying 10.10.10.2 …Open
User Access Verification
Password:
S1>en
Password:
S1#
Save the current configuration so that any mistakes you might make can be reversed by toggling the power for S1.
S1# copy running-config startup-config
Destination filename [startup-config]?
Building configuration…
[OK]
Show the current configuration and note that the passwords are in plain text. Enter the command that encrypts plain text passwords:
S1(config)# service password-encryption
Verify that the passwords are encrypted.