Port range forwarding on an MSR router to publish an internal server

[alexkg1]

Hi, Does anyone know how to do a port range forward on an MSN router?

I want to forward range port (50000-50100) on the internet interface to the same range on a server inside the network.

internet -->MSR Public IP port 50000-50100 -->LAN Server port 50000-50100

for one port example
interface GigabitEthernet0/0
nat server protocol tcp global x.x.x.x 80 inside 192.168.0.10 80

and how to make for port range??? please help

update: 

interface GigabitEthernet0/0
nat server protocol tcp global x.x.x.x 50000 50100 inside 192.168.0.10 50000 50100