Fraser I'm the friend David824 is talking about. I have the Netgear XR500 with DumaOs , He has the R1. I've read previous help threads about the ( Respond to ping on internet port ). By default it was unchecked. As far as I know the xr500 doesn't have stealth mode. Now on my end I can see him on the geo filter & add him with no problems , But he cannot see me. After we have joined other friends in a party while in spectating mode & played a few games we can join each other with no issues. I have an open Nat router has all updates and I have tried with the respond to ping checked & with it unchecked.