iPad for Engineers – CiscoPassword

Cisco PasswordPeriodically you may run across a Cisco router or switch with has a local password on it. Problem is that you don’t know what the password is. You can do a password recovery and change the password but changing may not be what you want to do at this point. Unless the person who set it up was fluent in setting up the device they probably went with the regular password option, also known as the Password 7 option, instead of using the secret command. If that is the case, all you need is the encrypted string that is the password. In this situation, what works in your favor is that the formula that Cisco uses to encrypt the password is weak and can be easily unencrypted. This is a known issue and the way to deal with it is to use the Secret command instead. There are plenty of web based tools that will un-encrypt the password string but that doesn’t do you a lot of good if you don’t have access to the Internet or the site you have bookmarked is down. You probably won’t need this much but having it handy when you need it will be “priceless” to quote a Mastercard commercial.

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