Step 1 – After creating or locating your .pem file, please rename it to get the .crt extension.
Step 2 – Now, open the window from the 'Access Gateway Cluster' tab.
Step 3 – In the 'Administration Tool', click on 'Access Gateway Cluster'.
Step 4 – Under 'Administration' tab, next to 'Upload a .crt signed certificate', select 'Browse'.