This option specifies the expected Xbox Live NAT classification of the DUT, either open, moderate, or restricted.
The final result of the Xbox NAT test is based on the expected classification of NAT on the DUT. The Xbox Live test classifies the NAT behavior of the device as either open, moderate, or strict. If this testvar is set to open, CDRouter will check that the device is classified as open, but the test can be configured to accept either moderate or strict by configuring this option.
Please see this Application Note for more information on Xbox compatibility testing with CDRouter.