AC 1300 - Port Forwarding is non-functional

WD Legacy Products My Net Networking Devices
2

Further attempts: I tried resetting to factory defaults and that did not work. I tried disabling IPv6 that did not work either. I found this thread with what seems like the same problem: http://community.wd.com/t5/My-Net-Networking-Devices/My-Net-AC1300-Port-Forwarding-problems/td-p/599225 No resolution was posted.