Did you test this from outside your LAN or did you try it from inside your LAN. For a few users Hair Pin NAT is not working correctly on their network hardware and they can only connect with their local IP when they are in their LAN.   When using the default bridge (which I btw recommend) you just forward UNRAIDIP:PORT in your router in your LAN and the same port on your WAN but no or all IP addresses on the WAN <- this depends on the manufacturer since no address means for most rou