Firewall openings on PDFCreator Server

Dear support,
I would like to know what is the domain/port, the PDFCreator Server need to contact in order to keep activated his license.
The goal of my request is to know what firewall openings i have to create in order to unexpose the PDFCreator Server on the Internet.
Thank you for your response.
Best regards,


Thank you for your inquiry.
Please send us a direct message to support ( so that we can address the issue directly.
We're looking forward to your message.

Kind regards,