how to decrypt username's password on the router?

Unanswered Question
Jan 29th, 2007

Hi, Just would like to know what tool I can use to decrypt the username which use for the console vty login as the previous admin left without the password.

Thanks.

I have this problem too.
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royalblues Tue, 01/30/2007 - 00:28

Friend,

There are lot of tools available on the net to crack the password of the cisco router.

One thing to remember though is you will be able to crack only the level 7 encrypted password and the enable secret.

With the VTY password you will be able to get into the user mode but if you dont remeber the enable secret password you cant get into the privelege mode. Password recovery would be the only option in this case

HTH, rate if it does

Narayan

mheusinger Tue, 01/30/2007 - 00:54

Hello,

Besides the afore mentioned tools, which will ONLY decode the "encryption" indicated by 7 in the command, the best bet would be to perform a password recovery. The relevant procedures are described in "Password Recovery Procedures"

http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_tech_note09186a00801746e6.shtml

You will need physical access to the router and it involves a reload, i.e. a network outage.

Hope this helps!

Regards, Martin

cindylee27 Tue, 01/30/2007 - 00:36

Hi Sprem,

This is useful! :D thanks..

but i managed to decrypt level 7 only.

But i could not get through enable secret 5 ?

h0w can i do that?

Thanks again!

spremkumar Tue, 01/30/2007 - 00:38

Hi Cindy

As mentioned by Naryan in his post you need to use password recovery procedure to reset the enable secret 5 password which is otherwise not possible with any kinda tools as of now..

regds

mheusinger Tue, 01/30/2007 - 02:19

Hello,

the "5" indicates MD5 encryption, which - to my knowledge - can not be decrypted to date.

So password recovery is your only option.

Regards, Martin

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Posted January 29, 2007 at 11:37 PM
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