Sql-server – SQL Server 2014 – localhost port

Edited my answer based on your additional info.

I would follow all of the steps here and let us know.

I think i can tell you exactly what the issue is, I spent over 48 hours trying to sort this. didnt find anything on the net. also happen to be with 1and1

look at these settings:

IP security policies.....

which opens box...............Packet Filter Properties near the bottom of the list there is a box ticked called :

'Close MSDE (TCP/UDP)' (I am asuming that MSDE = Microsoft SQL Database Engine?) Select it Press Edit...

which opens box............... Edit Rule Properties Select (again) >> 'Close MSDE (TCP/UDP)' Press Edit...

which opens box................IP filter List then you will see a list of ports tcp 1433, udp 1434 {Thats our list of ports all down as a blocking rule.....}

I think what needs to be done from here is either....

close that screen ..IP filter List on the screen Edit Rule Properties there is a tab Filter action, could just change that from Block to permit? (maybe changing it to permit, will allow us to tick the "Block All" option again - which sounds safer, but the support guys said there is a know bug, so might not work)

or

on the Packet Filter Properties

just untick the the rule 'Close MSDE (TCP/UDP)'

you might have to untick the rule 'Block ALL' to get it running

its probably to late for this to help you, but hopefully will help someone else with the same issue.