And I know a company that has been using 1/8, 2/8, 3/8, 4/8, 5/8, 6/8, 7/8 and 8/8 for many years, also behind NAT or on non-Internet connected networks. But that is not what I am talking about here. ...
And what happens if the legitimate owners of those already allocated start advertising routes for them on the public Internet, or IANA decides to release some of those not already allocated? Those NATs, if single-NAT'ed, will find themselves unable to reach those resources.
In general, there is simply no Internet connectivity for devices on these networks. Not eeven LAN connectivity.
In fact, I think I have seen some of those on the public Internet, I could be wrong.
But it is not a military application so who knows what some of the end users have done with their workstations. There is all kinds of wierd stuff out there. --Michael Dillon