How to connect via RDP without leaving traces?

Question

Information Security

The task has been set. There are two computers, each behind a router (Mikrotiki). They have static IPs. From one computer, you need to connect and work after another via RDP (or even via RemoteApp). It is necessary that this be without a trace (well, at most, it was visible in the port assignment rules on the router): so that it was impossible to see from which computer and to which computer the connection was made. It is desirable that this is not fixed by the provider either.
Explain to the noob how to organize it?

Answer 1

If you are hiding from the "provider", then you need a VPN through a third server (a third-party PC or a server with a different IP).