How to restore Cisco ASA Firewall to factory default?

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Restoring the Cisco ASA Firewall to default settings is quite easier, there are two ways to do this. In this post, lets see how we can do this using the Cisco IOS Command

config factory-default

Step 1

Connect the console cable to the console port of an ASA Firewall and to the serial port of your laptop or desktop

Step 2

Connect to the Cisco ASA Firewall using your favourite terminal client  ( I am using Secure CRT ) with the following serial setting

Baud rate9600
Data Bit8
Stop bits1
ASA - Reset1

Step 3

After login to Cisco ASA Firewall through the console port enter to enable mode

ASA - Reset2

Step 4

Enter to Config mode and enter the following Cisco IOS command and press enter

config factory-default

ASA - Reset4

You could see the Cisco ASA Firewall is configured to the factory default setting, reload the Cisco ASA Firewall with an IOS command

reload save-config noconfirm

By following the above steps one can reset the Cisco ASA Firewall to factory default settings, now you are free to access the firewall using either a console port or ASDM using the default IP address of, provided that you are connected to the Cisco ASA firewall on an ethernet or management port, this depends on the model please do check the datasheet of your firewall, in my case its a Cisco 5540 Firewall and the IP address is assigned to the management interface and the DHCP pool is also configured.

ASA - Reset7

The moment I connect my laptop to the management port of the Cisco ASA Firewall  I will get an IP address from the DHCP server of the ASA Firewall as shown below

ASA - Reset5

I could log in to Cisco ASA Firewall using my browser and I can manage the Cisco ASA Firewall by downloading the ASDM as shown below

ASA - Reset6

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