Starting with Jump Desktop Connect 6.7.42 you can run on-premise, high availability relay servers. Relay servers allow you to control how Jump Desktop traffic is routed through your infrastructure and isolate traffic to a specific host. All traffic is run through a specific set of UDP ports so you can control exactally what goes in and out and apply proper QoS if needed. You can use on-premise relay servers for better performance and increased security.
To get started, see the On-Premise Relay documentation.