To work on TFS Aggregator I use a number of virtual machines running different versions of Team Foundation Server. I also install the remote debugging tools (more info on remote debugging) inside the VM and I am good to go, except for a little tweak that I always forget. So I am writing about here as a reminder.
In my configuration the Virtual Machine in Hyper-V sees the network as Public while TFS setup, by default, opens the Firewall ports only on Private networks.
A few click and the problem is solved.