The command looked something like this for me: ciscoasa(config)# config-register 0x00000001 I like to use a command like this to find the user and password information I need to update: ciscoasa# show run | inc password | user | secretįinally, we must reset the configuration register value to the value displayed earlier. Be sure not to exit enabled mode until you are completed. Now, go ahead and replaced the passwords, usernames, etc that you need to replace to gain typical access to the unit. ciscoasa> enableĬiscoasa# copy startup-config running-config Get into enabled mode and issue the command “copy startup-config running-config”. Booting.Īfter all of the booting messages scroll by you will be left with an essentially un configured unit. rommon #1> bootīoot configuration file contains 2 entries. Go to ROMMON prompt if netboot fails? y/n :Įnable passing NVRAM file specs in auto-boot mode? y/n :ĭisable display of BREAK or ESC key prompt during auto-boot? y/n :Ĭurrent Configuration Register: 0x00000040 Do you wish to change this configuration? y/n : Y When all the options are completed you will be notified the changes have been committed. Current Configuration Register: 0x00000001Ĭhoose all default options with the exception of the option that says “disable system configuration?”. Additionally a wizard of sorts will start that will allow you to change the boot up parameters of the unit. Please take note of these as you will want to restore this later. “Confreg” will first display the current configuration register values. Ĭisco Systems ROMMON Version (1.0(12)6) #0: Mon Aug 21 19:34:Īfter breaking from the boot process you will be presented with the “rommon” prompt. As the system begins to boot press “ESC” to break the boot sequence. Have a console cable attached when you do this. Let’s dive right in and check out the steps!įirst, reset the device by removing and re applying power. You will see that with each step I included examples of the commands and the output along the way as well. Fortunately with the Cisco ASA it’s still not all that complicated. When inheriting used and abused customer networks it becomes necessary to reset passwords on devices the hard way from time to time.

Password recovery cisco 5505 asa