The underlying connection was closed: An unexpected error occurred on a send.— NuGet

Question

Whilst trying to restore nuget packages I am getting the following:-

Error 1 The underlying connection was closed: An unexpected error occurred on a send.<

Answer 1

I was having the same problem until I invoked my network admins. We found that our IPS flagged the domain as malware and we blocked it at our internal network level.

Once we removed the block, everything is now working again.

We also had problems getting images and css from codeplex project sites and this fixed that issue as well.