I'm experimenting with routing tables on my Windows 10 machine, to gain more control of traffic. I've noticed that the NCSI will show no internet when there is.
Specifically, if I eliminate the default route (0.0.0.0/0), then the NCSI displays "No internet", even when I add equivalent routes back into the routing table. For example if add 128.0.0.0/1 and 0.0.0.0/1, both pointing to the same gateway and interface, I would think I've essentially broken the default route into two pieces, one piece for IPs that start with 1 and one piece for IPs that start with 0. This should cover all possible IPs, and indeed, I can connect to any site on the internet. I'm having trouble seeing how this is not functionally equivalent to a single route of 0.0.0.0/0 pointing to the same interface.
Also, I can specifically connect to "http://www.msftncsi.com/ncsi.txt" and resolve the name "dns.msftncsi.com" to 131.107.255.255. From what I can gather these are the two tests that NCSI uses to determine connectivity, and yet it still displays "no internet".
What gives?
