This post will help those who want to integrate DUO MFA on Checkpoint Remote Access/Mobile Access VPN.
Step 1 - Follow this documentation shared by DUO for Checkpoint Mobile Access Two-Factor Authentication for Check Point Mobile Access | Duo Security
Apart from the above steps, it required additional configuration on Checkpoint for DUO MFA to work
Step 2 - Follow the steps below
Go to Manage and Settings followed by Blades and then Click “Configure in SmartDashboard”. The legacy SmartDashboard client will open.
Click on the “User” icon in the Object Explorer in the bottom left. Then right-click “External User Profiles” and select “New External User Profile > Match all users”.
Select Authentication on the left pane. Change the Authentication Scheme to RADIUS and select the RADIUS server object we created for DUOMFA.
Click “OK” and save your changes. Then close the SmartDashboard window.