Hi I have been having issues opening ports on my new router. I am able to use UPnP perfectly fine it will open ports for its clients. also I am able to set remote management of the router on any port and when I use the tool at https://www.grc.com/ it shows open. But when I add ports to be forwarded manually and run the port checker they come back as closed but not stealth. when I remove them they come back as stealth. This is very frustrating because I would like to open a few ports. How do I set the ports to be open instead of just closed and not stealth.