What protection can I take against a not very experienced attacker (15 kid) who wants your Wi-Fi password, wannabe hacker and using ARP spoofing and programs such as: wifikill, selfishnet, netcut, wireshark, dumper, jumpstarter, crunch, wpswin, veracrypt, ettercap, hydra.
He owns a laptop with Windows 8 and Kali Linux on VirtualBox, which I have my hand on now to format and install an OS (is there any restriction I can make or any recommendations you suggest).
My router is a NETGEAR dg84 v3. I know it's very old. can I do something like a guest network with it?
What steps I need to perform to achieve that?
I don't want him sniffing everyone's traffic and hijacking passwords, what can I do in my situation other than getting another Wi-Fi connection?
How much damage he can do with such programs? And does programs such as Ettercap, hydra and Wireshark works if I enabled the wireless isolation? And disable remote access and WPS?
When he is sniffing traffic and passwords does it happen in real time? Or is it stored somehow in the router and he can view it when want?
And which program is the most dangerous one?