MacBook – Someone is accessing the computer through remote desktop. How to i block that

Don't forward local port 3389, various versions of Remote Desktop are too smart for their own good.

My usual steps involve forwarding local 3390 to remote 3389. Then, in MacRDC I use: localhost:3390 as the address to connect too.

I don't know if you're using anything to assist in the ssh connection setup, but from the command line, it would be something like:

ssh -L 3390:172.16.5.32:3389 jason@remote.net

Where;
- 3390 is the local forwarding port on my box.
- 172.16.5.32 is the remote windows host. and;
- 3389 is the Remote Desktop Port (obviously).

"Wake for network access" refers to the system receiving a special "Wake On Media" or "Wake On LAN" packet from the local ethernet network.

Simply trying to connect with a network application will not wake it up. That's because while the computer is sleeping, it cannot process any network traffic. WOM works at the hardware level of the ethernet card: the card stays powered on and when it sees an ethernet packet with its MAC address and a certain byte pattern, it wakes up the computer.

Because WOM is based on ethernet frames, it generally cannot not work by itself outside of your local LAN. Some routers provide utilities which let you remotely instruct the router to generate a WOM packet, but not typically consumer grade routers.