Coldfusion Performance Monitor - External Servers

Is it possible to connect to an external instance of CF 2018 from the Coldfusion Performance Monitoring Toolset?

We have our usual internal servers that have been picked up across the subnet. We also have 1 external server outside of this network that we would like to monitor on the same toolset.

Can this be done? Assuming ports are opened etc. Dont seem to be able to set an external IP as the host for the datastore either.

Initially trying it does not seem to work. Either more ports need to be opened that I am not aware of or it is not possible.