Want to add that i tried your tool but i cannot lock the lobby.
Disconnect works perfectly fine but even if i enable the lock, people will still join the session.
Tried on a Win10 Pro 64bit and Win7 Pro 64bit Machine.
Both Windows Firewall running.
Run the Tool as Admin and not while inside any Vehicle.
Edit: If i enter manually the Ports on my Firewall i can play alone on Public Sessions
6672,61455,61457,61456,61458
but ALONE, no one else, not even a friend can play with me.
If a friend could play with me, that would be awesome, but i'm having anyways a blast doin Ceo stuff without cheaters and teenagers.