Thanks for this. I finally had the time to set this up. I have it working on my Win10 rig and I will try the Ubuntu rigs next. Bunkering around 600 projects for Numberfields between the 3 rigs, mostly GPU, and I will fire up the next client when those downloaded tasks are complete.
So if I understand this correctly I block the IP on all my clients. When those projects are complete, I close that instance of BOINC, start "BOINC2", allow the IP to get new projects and then block it again?