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Airodump-ng shows AP on negative channel

Çağlar Arlı      -    2 Views

Airodump-ng shows AP on negative channel

I am new to WiFi and was trying to learn pentesting with the aircrack-ng suite.

In the following airodump-ng excerpt, any idea why airodump-ng is showing an access point with negative value -1 as the channel?

airodump-ng excerpt displaying a negative channel value for one line

The AP seems to be hidden but I got a reasonable PWR reading, as opposed to the ones with PWR = -1 described in Airodump-ng -1 DB networks.

Intrigued by this behaviour, I tried to use Kismet and it actually shows a positive channel for that AP.

Using Airodump-ng with option --channel and using kismet found channel I got results. Still can't figure out what is going on