Yes I have found it. You do not need to change the net driver. Now I did some modifications in DefaultEngine.ini (AndroidEngine.ini if needed for android)
Disabling NAT forces EOS to use direct connections between Players. Not trough EOS servers. Find [OnlineSubsystem] tag then add bIsUsingNAT=false line. Do this, then restart the engine.
[OnlineSubsystem]
bIsUsingNAT=false;
Let me know if that works.