Hi Dauphineo,
Thanks for reaching out to us.
For detailed information, please login in Gemalto Customer Support Portal and refer to the Knowledge Base article KB0010175 "Sentinel Rights Management Service Behavior over VPN" https://gemalto.service-now.com/kb_view.do?sysparm_article=KB0010175
You may also refer to article KB0017118 for more information.
Hope it helps ! Please feel free to get back to me.
Regards,
Gaurav Bhanot