The server eats up all the speed, why and how to solve it?

Question

Windows Server

Hello. Recently engaged in sys.administration, earlier I was only partially familiar with this.
The enterprise has 2 dedicated ip.
One of them is connected to a server (powerful hardware), the speed is provided 10mb/s for 2 ip-shniks.
When I just picked up the server, everything worked flawlessly, calmly clung to the server from home and worked, it happened that 3-4 users worked simultaneously in 1'sks . Then he left and a week later, some kind of game happens. I really can’t connect to the server, because the connection is interrupted.
I put the second one dedicated to my computer, I calmly go to the server from it, without problems (I used to come from any computers earlier). But the Internet on this computer sags. I sinned on weather conditions -40 all things, but I called the provider and he told me that we are trying to eat 34mb / s, although the limit is 10mb / s

It costs Windows Server 2012 r2. Nothing is running, unhooked all terminals.
Where to dig? How to see where the speed goes, even if I can’t connect normally through the RDP.
I myself am a developer, but still an amateur in working with servers. Please suggest a solution to the problem, or rather where to look?

Answer 1

Exactly as described above.
Or updates are downloaded + distributed. Moreover, from all computers on the network, this can be
Either you set rdp to an open Internet, then wait for problems
RDP is used only through vpn, like any local Windows resources