For making a Call Of Duty Server using cod-rcon tool, I have port forwarded the following ports: 28960, 28961, 20500 and 20510 (all ports in UDP). If I use this website to check if the ports are open (in UDP), I find all four are. But if I use this site, it shows all the four ports as closed. I have also disabled my windows firewall (and made exceptions for the program too).
Now, after this setup, when I run the cod-rcon tool, it gives a connection error saying that the port might be down. So, where am I going wrong?