Maybe Microsoft employees are able to access this site because they are accessing it from the Microsoft intranet which has a DNS zone created for prev.windows.microsoft.com while external doesn't. Or maybe the DNS entry now resolves to something different internally than it does externally.
I'm assuming this is another build, since this one has notification center and technical preview from the shoots seems to not have it, and who posted this hide the build number...
That's indeed the case for a lot of things, I always wonder if it would be possible to connect to their DNS server...
And the "Microsoft Confidential" thing is there. It might be. But since the poster hide the full build number...
When someone gets their ISO's they should upload it to some mirrors just incase the server overloads.
To everyone who saw @benriga's tweet about how he got in the Insider program, he has just confirmed that there are no downloads available yet! Everybody chill out!
Tried resolving prev.windows.microsoft.com using Microsoft's publicly listed DNS servers microsoft.com nameserver = ns2.msft.net microsoft.com nameserver = ns3.msft.net microsoft.com nameserver = ns4.msft.net microsoft.com nameserver = ns5.msft.net microsoft.com nameserver = ns1.msft.net None of those DNS servers seem to accept public DNS queries.