Proxy for Downstream Traffic (Recommended)

The proxy often resides in the DMZ for the network and presents a virtual IP address to forward requests from the on-prem Synthetic Server to SaaS Synthetic Server through the SaaS EUM Server as shown below.

Connection	Source	Destination	Protocol	Default Port(s)
	The on-prem Synthetic Scheduler sends the job requests to the proxy server, which then forwards the requests to the SaaS EUM Server	SaaS EUM Server	HTTP(S)	7001/7002
	The SaaS EUM Server forwards the job requests to the SaaS Synthetic Server.	SaaS Synthetic Server	HTTP(S)	N/A

The on-prem Synthetic Server Client Feeder communicates with the SaaS Synthetic Server Feeder through a bi-directional WebSocket connection that is not made through the proxy server.

Proxy for Downstream and Upstream (Optional)

When setting a proxy for downstream and upstream traffic, the proxy must support WebSocket. The on-prem Synthetic Server Client Feeder initializes the WebSocket connection with the SaaS Synthetic Server Feeder through the proxy server. Once the WebSocket connection is established, the on-prem Synthetic Server Client Feeder and the SaaS Synthetic Server Feeder can use the persistent connect to make bi-directional requests.

Connection	Source	Destination	Protocol	Default Port(s)
	The on-prem Synthetic Server (Scheduler) sends the job requests to the proxy server, when then forwards the requests to the SaaS EUM Server.	SaaS EUM Server	HTTP(S)	7001/7002
	The SaaS EUM Server forwards the requests to the SaaS Synthetic Server.	SaaS Synthetic Server	HTTP(S)	N/A
	The on-prem Synthetic Server (Client Feeder) establishes a WebSocket connection with the SaaS Synthetic Server (Synthetic Server Feeder) through the proxy server.	SaaS Synthetic Server	HTTP(S)	80/443
		on-prem Synthetic Server	HTTP(S)	80/443
	The SaaS Synthetic Server (Synthetic Server Feeder) and on-prem Synthetic Server (Client Feeder) communicate bi-directionally through the proxy server. Most of the traffic is from the SaaS Synthetic Server Feeder to the on-prem Synthetic Client Feeder.	on-prem Synthetic Server	WebSocket	16101
		SaaS Synthetic Server	WebSocket	16001