!— Step 1: Configure the hostname if you have not previously done so.

conf t

hostname switchname

!— The aaa new-model command causes the local username and password on the router

!— to be used in the absence of other AAA statements.

aaa new-model

username SomeUsername password 0 MySecretPasswordNoOneKnows

!— Step 2: Configure the DNS domain of the router.

ip domain-name mydomain.com

!— Step 3: Generate an SSH key to be used with SSH.

crypto key generate rsa

ip ssh time-out 60

ip ssh authentication-retries 2

!— Step 4: By default the vtys’ transport is Telnet. In this case,

!— Telnet is disabled and only SSH is supported.

line vty 0 4

transport input SSH

!— Step 5: Save your work!

exit

wr mem