https://trisquel.info/en/forum/intel-management-engine-depth-paper
http://libreboot.org/faq/#intel
As
soon as i know there are many speculations about a universal backdoor
in the Intel Processor.
I'm not an expert in such things, but If so, then some kind of
Remote-SSH has to be enabled at the bios / cpu, in order to bypass
router firewalls, wich will try to contact a server in the internet
https://en.wikipedia.org/wiki/Intel_AMT
The bad thing, is that: you paying backd00rs when you buy an Intel CPU.