1. CISCO NETWORKING ACADEMY Chabot College ELEC 99.08 router passwords

2. CISCO NETWORKING ACADEMY passwords enable enable secret console aux vty (telnet sessions)

3. CISCO NETWORKING ACADEMY enable password controls access to privileged exec mode by default is not encrypted can be encrypted, but with weak protocol version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Fremont ! enable password cisco enable secret 5 $1$IpVp$omFRfC1zaVwq.9UOCL3lB. ! Enable password No encryption of enable password

4. CISCO NETWORKING ACADEMY enable password - continued leftover from older versions of IOS only used if the enable secret password has not been set version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Fremont ! enable password cisco enable secret 5 $1$IpVp$omFRfC1zaVwq.9UOCL3lB. !

5. CISCO NETWORKING ACADEMY enable secret password controls access to privileged exec mode is encrypted using the MD5 algorithm takes precedence over enable password version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Fremont ! enable password cisco enable secret 5 $1$IpVp$omFRfC1zaVwq.9UOCL3lB. ! MD5 encryption algorithm

6. CISCO NETWORKING ACADEMY console password controls access through console port may be same or different than enable password ip route 0.0.0.0 0.0.0.0 Serial1 ! line con 0 login password cisco line aux 0 login password cisco line vty 0 4 login password cisco !

7. CISCO NETWORKING ACADEMY aux password controls access through auxiliary port may be same or different than enable or console passwords ip route 0.0.0.0 0.0.0.0 Serial1 ! line con 0 login password cisco line aux 0 login password cisco line vty 0 4 login password cisco !

8. CISCO NETWORKING ACADEMY vty password controls telnet access through vty ports may be same or different than enable, console, or aux passwords ip route 0.0.0.0 0.0.0.0 Serial1 ! line con 0 login password cisco line aux 0 login password cisco line vty 0 4 login password cisco !

9. CISCO NETWORKING ACADEMY 2 Passwords in Sequence 1. Access to Router 2. Access to Privileged Mode Console Password Aux Password VTY (telnet) Password Enable Secret Password

10. CISCO NETWORKING ACADEMY Password Strategies Strategy 1 –Use a special password for enable secret. –Use the same password for all others. Benefits –Easy to remember But –Blanket access to those who know password

11. CISCO NETWORKING ACADEMY Password Strategies Strategy 2 –Use a special password for enable secret. –Use different passwords for: console aux vty 0 - 4 Benefits –Fine-grained control But –Hard to remember

12. CISCO NETWORKING ACADEMY Password Rules Always set the enable secret password. Never make the enable secret password the same as others that show in plain text in the config file. If you set the enable secret password, there is no need to set the enable password, which is weak because it is not encrypted. However, setup forces you to set an enable password.

13. CISCO NETWORKING ACADEMY Strong Passwords Never use a word in the dictionary. Never use anything related to your name. Ideally, use a special character or number in addition to letters. A good method is to combine two short words with a special character: –red$finger –proud^dog (easy to remember, meets rules above)

14. CISCO NETWORKING ACADEMY Strong Passwords In our lab, we break the rules to set easy to remember passwords: –enable secret: chabot –all access passwords: cisco

15. CISCO NETWORKING ACADEMY What password to telnet in? cats#rats ip route 0.0.0.0 0.0.0.0 Serial1 ! line con 0 login password donut*hound line aux 0 login password kiss@frog line vty 0 4 login password cats#rats !

16. CISCO NETWORKING ACADEMY What password to console in? donut*hound ip route 0.0.0.0 0.0.0.0 Serial1 ! line con 0 login password donut*hound line aux 0 login password kiss@frog line vty 0 4 login password cats#rats !

17. CISCO NETWORKING ACADEMY What password to connect with modem? kiss@frog ip route 0.0.0.0 0.0.0.0 Serial1 ! line con 0 login password donut*hound line aux 0 login password kiss@frog line vty 0 4 login password cats#rats !

18. CISCO NETWORKING ACADEMY What password to enter privilged mode? high-hat (encrypted secret password) version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Hayward ! enable password apple&candy enable secret 5 $1$IpVp$omFRfC1zaVwq.9UOCL3lB. !