How to reset cisco ASA 5505 to factory default settings

Step 1:
Go to global configuration mode by below command

ASA5505# config terminal
Step 2:
Now give below command to make firewall at default setting

ASA5505(config)# config factory-default 

If you want to get back to the prompt that looks like: ‘ciscoasa(config)#’
Then you have to follow third step

Step 3:

ASA5505(config)# reload save-config noconfirm

Now make sure that the outside line is plugged into port ethernet0, and your pc is plugged into any of the ports 1-7.

The Cisco ASA has been reset to factory settings. DHCP is enabled on the cisco device, and it’s internal IP address is now 192.168.1.1!

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