Decrypting router passwords with a router

The command “show key chain” shows the decrypted key strings, and because of that, can be used to decrypt other type 7 passwords:

R1(config)#username cisco password cisco
R1(config)#do show run | include password 7
username cisco password 7 05080F1C2243
 password 7 ****
R1(config)#key chain CRACK
R1(config-keychain)#key 1
R1(config-keychain-key)#key-string 7 05080F1C2243
R1(config-keychain-key)#do show key chain
Key-chain CRACK:
    key 1 — text “cisco”
        accept lifetime (always valid) – (always valid) [valid now]
        send lifetime (always valid) – (always valid) [valid now]

3 thoughts on “Decrypting router passwords with a router

  1. Pingback: Initial Configuration of IOS Devices | Route, Switch, Blog

  2. Pingback: Reversible vs. Non-Reversible Encryption | Route, Switch, Blog

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.