Hello fellow Ubuntu users, I am running 32-bit Xubuntu 12.10 and I am curious how to monitor my home network.
I have few questions:
1. How can I see all the devices currently connected to my Wi-Fi? (And can I? Since I am using computer that is connected over ethernet cord)
2. How can I shut them off the my network?
3. Is there any way to protect myself from possible MITM attacks?
4. Does any GUI-based app for full network monitoring exists?

My regards, stay brutal.