Protect against brute-force attacks.
This restricts the line to only accept SSH. (Telnet is disabled by this command, which is good). cisco ssh 1.25
Secure Shell (SSH) is a secure protocol used to remotely access and manage network devices. Cisco SSH 1.25 refers to the SSH version 1.25 implementation on Cisco devices. This guide provides a step-by-step configuration guide for setting up SSH on a Cisco device running SSH version 1.25. Protect against brute-force attacks
(Note: Use secret instead of password . secret hashes the password in the config, while password stores it in clear text). cisco ssh 1.25
If you mess up the key generation, you can zeroize (delete) them:
The RSA key is the foundation of SSH. The size of the key dictates the security level.