Setting banners using the ASDM
As mentioned earlier, there are many banner types. Each banner specifically displays a message for a particular type of administrative access to the ASA. To set a banner on the ASA using the ASDM, navigate to Configuration
| Device Management
| Management Access
| Command Line (CLI)
| Banner
. Here you'll be able to set all the different banners the ASA supports:

Remember, once you're done, click on Apply
and save the settings of the ASA.