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Wifiopn-cap is an automated script which allows you to capture the packets of unsecured (open) wireless networks. By changing the options in this script, you can define how long to spend on each network capturing packets, how long airodump-ng will run on all channels and when is a reasonable last seen time for an open network so we can capture packets from that network. As this script runs in another terminal from airodump-ng you can view the networks as per normal in the airodump-ng terminal.
Wifiopn-cap uses the aircrack-ng v0.9.3 suite (specifically airodump-ng).
1. Change the INTERFACE value (in configuration) to suit your wireless card
2. Copy your airodump-ng file (located in /pentest/wireless/aircrack-ng/) and name it as wifiopn-airodump-ng so we can kill this process only
3. Open a shell and have airodump-ng running on any channel and writing to a file name of your choice before excuting this script (e.g airodump-ng -c 1 -w captureopn ath0)
4. Finally open up another shell and run this script :)