Now you have a working firewall.
You cannot legally download these images for free from random file-sharing websites (Torrents, MediaFire, Google Drive links). Download Free Cisco Asa Firewall Ios Image For Gns3
Navigate to the Cisco ASA Firewall IOS image download page . You will need to log in with your Cisco account credentials. Now you have a working firewall
Click on the "Download" button to start the download process. Depending on your internet connection, this may take a few minutes. this may take a few minutes.