Network technologies and trends

Jan 4 2016   5:04AM GMT

How to restore Cisco ASA Firewall to factory default?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan

Cisco Firewall
Console port
IOS commands


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 favorite terminal client  ( I am using Secure CRT ) with following serial setting

Baud rate 9600
Data Bit 8
Parity None
Stop bits 1

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 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 Cisco ASA firewall on an ethernet or management port, this depends on the model please do check the data sheet of your firewall, in my case its a Cisco 5540 Firewall and the IP address is assigned to 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 got an IP address from the DHCP server of ASA Firewall as shown below

ASA - Reset5

I could login 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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