There are two primary (and related) security concerns relating to communicating with the CheckPoint License Server:

1. Point to point security of the information - It is highly recommended that you use SSL to secure any and all communication with the CheckPoint License Server.  This ensures security of the information passed between the server and the caller (some other part of your back end).  In this way, you can be assured that even if packets were intercepted by an attacker - they would be unable to use the information to directly access the CheckPoint License Server.   
   
   Keep in mind that proxy servers generally can not act as a proxy for HTTPS (SSL) communication.  HTTPS requires a secure handshake from point-to-point to enable its secure communications.  A proxy server can not be in between the two participants (client and server) of an SSL communication. Most enterprises that use proxy servers allow direct outbound SSL communication for the workstations (default port 443) to allow SSL communication to work.  If you are deploying your CheckPoint Server to be accessible via HTTPS only, be sure to take this into account when managing proxy server information for your clients.
2. Brute force attacks - It is highly recommended that you configure an upstream router or fire wall from your CheckPoint License Server to not forward requests from a specific requester if a large number of them come in from the same requester over a short period of time.  This allows you to effectively block programmatic authentication attacks or denial of service attacks on either of the CheckPoint interfaces. Most production quality fire-wall software has this feature.

Note: The GameShield CheckPoint™ License Server only comes with the Server Edition of the GameShield System.