Risk is based on the probability of threats exploiting assets with certain vulnerabilities. Information security policies should be based on risk analysis and risk management. The moral of this story: You can’t undo the word of service password-encryption, but you can overwrite it.We will start with physical security, followed by basic controls like implementing a password strategy, sign posting via login banners, and the use of SSH for improved and confidential configuration management. The resulting running config: username chris password 0 bryant R2(config)#username chris password bryant (Particularly sad, since the password is his last name.) I’ll simply overwrite it and the password will appear in clear text. I’ll assume the person using the password chris has forgotten his password. While we can’t de-encrypt any of these passwords, we can overwrite them. The zero in the new username / password combination indicates an unencrypted password. The running config shows this password is left in clear text, while a password we configured in the previous lab is still encrypted. Turning this service off after some passwords have already been encrypted is the reason you can end up with some encrypted passwords and others not-so-encrypted, as shown here: R2(config)#username mountain password dew Naturally, any passwords entered once the service is turned off will not be encrypted. enable secret 5 $1$pRqy$gGBndy2EvAkm.SEMK4tq01ĭisabling password encryption does not undo any prior encryption performed by this service. The enable secret and enable password at the top of the config gives us the answer. enable secret 5 $1$pRqy$gGBndy2EvAkm.SEMK4tq01Ĭan we reverse the encryption by disabling the service? R2(config)#no service password-encryption Here are the passwords from our Cisco router as they stood at the end of the previous lab., along with the associated login commands where needed. In a nutshell, they were successfully encrypted - but can this process be reversed? Let’s find out! In the first part of this CCNA and CCENT tutorial on the password encryption service, we saw the effects of this service on our router’s unencrypted passwords. An all-new series for the 200-301 exam is launching on September 2, 2020!ĬCNA 200-125 Tutorial: “Reversing” Password Encryption Join me on YouTube for free CCNA 5:00 Video Boot Camps, Video Practice Exams, and more.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2022
Categories |