Yeah... something is definitely going on with the HP download links today. All of my shortcuts for the various DL series servers I have (mix of 360 and 380 and from G5 up to Gen8). None of the links work.
I thought maybe they switched it so you really do need to login with a valid contract, so I tried that (my newest G7 and Gen8 boxes are all under warranty) but there's nothing in the "software depot" either except the 2014.02.0 SPP and stuff like that.
I'm guessing they're just doing some maintenance... it's not like HP decided to stop supporting ALL of the Proliant servers today. I hope. :)