Example:

• int g1/0/24
• switchport mode access
• switchport port-security maximum 1
• switchport port-security violation shutdown (protect, restrict)

To enable the function Type:    switchport port-security

To check a port security status  type:   show port-security    (show port-security int g1/0/24 for detailed info)

To bring a port from a shutdown state:

• int g1/0/24 
• shutdown
• no shutdown

Configuring SSH on a Cisco Device

1. Create hostname                    hostname abc
2. Configure a Domain name   ip domain-name abc.com
3. Generate encryption keys     crypto key generate rsa   -> How many bits in the modulus [512]:
4. Enable SSH version 2            ip ssh version 2
5. Create local user account(s) username Peter  secret password
6. line vty 0 4
   
7. Allow telnet or ssh                  transport input telnet ssh
8. Enable local login                    login local 
9. Write mem