Hello, My problem: I have a PC(1) that is running the dedicated server tool. I have a 2nd PC(2) that I want to connect to the server. When joining the server I get a No Response. External clients can join my server, and PC(1) can join it's own server using this trick, but my PC(2) can't reach it, and always gives a no response. It does show up in the server browser, but "-ms" ping and a no response after picking a car.
Try putting PC that runs dedicated server to a DMZ in your router settings. Typically you need to use LAN ip address of PC to do that.