How to load test Checkpoint Endpoint s/w VPN ?

has anyone load tested Checkpoint Endpoint VPN s/w to determine if their environment is set up properly to handle large loads

We are in process of setting up Corono Virus contingency plan to ensure our setup can handle 10,000 concurrent users. 



1. What protocol would be best suited to load test Checkpoint Endpoint s/w.

-> I am thinking winsock as the client is windows based.

2. Would we need 10,000 unique IP addresses or 10,000 unique logins to test this s/w

3. What issues could I face testing VPN software ?

4. Running the scenario in Storm-runner w/5,000 vusers