Before installing Cisco ASDM 7.18, ensure your system meets the minimum requirements:

You can obtain the ASDM image directly from the Cisco Software Central portal or from the ASA device itself. Step 1: Enable HTTP Server on your ASA

: If the browser shows "Connection Not Secure," proceed anyway—the ASA uses a self-signed certificate by default. For production, replace it with a CA-signed cert.

If you have an older ASDM version working, you can use its "Update Software" feature:

There are two primary ways to obtain ASDM 7.18: from Cisco's official software portal or directly from your security appliance. Option A: Cisco Software Central (Official)

When you use the "Prepare" feature, ASDM automates several pre-deployment steps to ensure a smooth transition during your next maintenance window: File Transfer