To set page and REST endpoint permissions via the DNS Integrity Gateway user interface:
Under Available Actions, click Workflow Permissions.
From the Workflows, select the admin workflow.
From the Pages field, select workflow_permissions.
In the New Group Name field, type the PortalGroup UDF value or user group name
then click ADD. The changes should now be saved.
There is no need to restart the DNS Integrity Gateway when using this method, but users will need to log out and back in to see the changes.