Step8: Reload the ASA appliance by entering the following command rommon #3> boot The firewall will reboot and load the default configuration instead of the startup configuration. Step 2 Power off the ASA, and then power it on. Password Recovery Procedure To recover passwords for the ASA, perform the following steps: Step 1 Connect to the ASA console port according to the instructions in Accessing the Command-Line Interface section. Since that did not work for you, the ASA is already configured with some other password and you had to try do password recovery: 1. The default enable password of an unconfigured ASA or an ASA configured with factory defaults is empty, so you had just to hit enter. Finally, to exit out of ROMMON and have the ASA boot with. hostname (config)# username name password password. hostname (config)# enable password password. Set it as a static IP using these directions This post will detail how to reset back to a factory default configuration the Cisco ASA5505.If password have been forgotten and or access to the Cisco Router is limited or configurations have been done incorrectly, resetting back to the factory default settings can assist From here you can paste in the config file you would like to use or simply change the password so you can administer the device as you normally would. Then make sure that your ISP gives you an IP address for the Cisco device. I've never had to do this, so good luck! Next, use the instructions on this page to reset the Cisco ASA 5505 back to factory defaults.

When the ASA has booted you will load the configuration to the ASA (as you have already accessed its CLI) and you change the AAA information to what you like and save the configuration Reset the password using these instructions Lawrence submitted. Basicly to my understanding it interrupts the normal ASA boot and lets the ASA boot without configuration. Here is the guide to recovering lost password from Cisco. Home Cisco ASA 5505 factory reset without password how to reset a ASA5505 withou the password - Cisco Communit

Cisco asa 5505 configuration guide pdf