Note If the Parameters value does not exist, you must create it.
To configure a larger port range (for example, 50,000–54,999), create a new REG_SZ (String Value) entry that's named ReservedPorts. Make sure that you use the XXXX-YYYY format.
If the server is being used only for NAT routing, the likelihood of a port conflict is minimal. However, if other processes are also used on the server, careful consideration must be taken to avoid possible port conflicts.
For example, assume that ports 50000–54999 are reserved for the IPNAT service and that another application has also reserved ports in this range. If one of the applications consumes these ports, and they are not available for the other application, a port conflict occurs, and this causes issues with the application.
To avoid other potential conflicts, make sure that the IPNAT-reserved ports don't conflict with the ReservedPorts registry entry that's used by TCP/IP. This value can be found in the following registry location:
Windows Server 2008 Datacenter, Windows Server 2008 R2 Datacenter, Windows Server 2012 Datacenter, Windows Server 2012 Essentials, Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Standard, Windows Server 2012 Standard, Windows Server 2008 Enterprise, Windows Server 2008 R2 Enterprise, Windows Server 2008 R2 Standard, Windows Server 2008 Standard