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Comment by punnerud | Hacker News Reader

Use the guide I posted here to locate the device responsible using the signal-strength in Wireshark (search for NKOM).

Could be you can break the device by flooding it with fake SSID, using AirPlay-ng. A bit more technical but should be possible with every Mac or most WIFi dongles that support monitor-mode (could be illegal).

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I did follow it and found roughly where it is. But, have not talked to that landlord. It is a 3 story building with a handful of apartments in an old stone and brick building locked at the ground floor (i.e. refection is a problem but I imagine signal strength outside the door would be a good indicator once inside).

Not sure about breaking the device by flooding with SSIDs? Sorry, not my area here. From what I know, it isn't on any network (it does appear to have a network with an SSID though), but it is attacking up and down all nearby devices regardless of channel or SSID.

"Flooding with SSIDs" means generating lots of fake SSIDs each second to trick that device into attacking those fake SSIDs and keep it busy. Keept it genrating even more (use several wifi adapters) until the other device goes crazy. You can use some of the tools (like aireplay) from the aircrack-ng suite for generating fake SSIDs

"I did follow it and found roughly where it is. But, have not talked to that landlord. It is a 3 story building with a handful of apartments in an old stone and brick building locked at the ground floor (i.e. refection is a problem but I imagine signal strength outside the door would be a good indicator once inside)."

Have you considered that what you are seeing is unintentional ? I myself have set up many different (RX only!) experiments in GNU Radio, etc., and had to leave them sit for weeks at a time while I was busy with actual work.

Maybe someone was tinkering/playing/experimenting and just left it on ? I would suggest putting up a polite, but loud and eye-catching one page sign at the entrance to this building alerting someone that they are dramatically impacting their neighbors.

Look for the one SSID that is unaffected and I'd bet you'd find the culprit. It's possible that someone set it up solely to screw up WiFi for everyone else but I'd bet money that the reason why they did that is specifically so that the spectrum is left wide open for themselves. WiFi in an apartment right next to a bunch of businesses generally sucks because of the density, it's probably just some selfish script kiddy thinking they're some uber l33t hacker and thinking they can't be caught screwing over their neighbor's WiFi.

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