The value of tmnxNatPlPortFwdRangeEnd specifies the end of the port range
available for port forwarding.
The start of the range is always equal to one.
The actual maximum value of the object tmnxNatPlPortFwdRangeEnd
may be restricted to less than 65535,
depending on the value of the objects tmnxNatPlPortResvType and
tmnxNatPlPortResvVal and on system specifications.