It occurs in all environments when connecting also "Sql management studio" :

TITLE: Connect to Server

------------------------------

Cannot connect to 127.0.0.1.

------------------------------

ADDITIONAL INFORMATION:

Connection Timeout Expired. The timeout period elapsed while attempting to consume the pre-login handshake acknowledgement. This could be because the pre-login handshake failed or the server was unable to respond back in time. The duration spent while attempting to connect to this server was - [Pre-Login] initialization=1; handshake=14998; (Microsoft SQL Server, Error: -2)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&EvtSrc=MSSQLServer&EvtID=-2&LinkId=20476

------------------------------

The wait operation timed out

------------------------------

BUTTONS:

OK

------------------------------