How to Password Reset on ASA 5505

Step1: Reboot ASA

Step 2: Wait till the you can see following “Use BREAK or ESC to interrupt boot.”  and then hit the ESC key, works on MAC/Terminal as well. (see below)

 

Step 3: Then you should land in “rommon #0>”

Step 4: Change the confreg valu to 0x41 as it tells to ignore its saved (startup) configuration upon boot

rommon #2> confreg 0×41

Step 5: reboot

rommon #2> reboot

Step 6: After the reboot you need to change the confreg value back to 0x01 and reboot.

ciscoasa(config)# config-register 0x01
ciscoasa# reboot

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