Docker can't communicate with VM

[oldschool]

I have a Guacamole Docker that I want to use for remote sessions with some of my computers on my LAN and for remote sessions with the VM's on unraid.

 

The VM's on unraid can see the Guacamole webui, the Guacamole server is working to connect to my physical computers but it can not connect to my VMs.

 

I've seen a lot of issues on forums with Docker to Docker communication, with VM to Docker communication, all of that seems to be working fine for me but I am having problems with Docker to VM communication.

 

I've tried the network several ways, bridged, br0, br0.1 custom network and none seem to be able to work.

 

Any ideas on how I can set it up so Guacamole or a specific docker, or any docker can communicate with one of the unraid VMs?

 

Thanks!

[oldschool]

Does anyone have some insight on this at all?  I apologize if this has previously been covered, I attempted to research and was unable to find a resolution or a problem with the exact same scenario.