Avoid TP-Link TL-WN722N v2/v3 – they use a different chipset with poor Linux support. 6. Install/update drivers for your adapter If using an RTL88x2AU or RTL8812AU chipset:
| Chipset | Example Adapter | Monitor Mode | Packet Injection | |---------------|--------------------------------|--------------|------------------| | | Alfa AWUS036ACH | Yes | Yes | | RTL8187 | Alfa AWUS036H (legacy) | Yes | Yes | | AR9271 | TP-Link TL-WN722N (v1 only) | Yes | Yes | | MT7612U | Panda Wireless PAU09 | Yes | Yes | Kali Linux Fern Wifi Cracker No Wireless Interface Was Found
ip a Look for wlan0 , wlan1 , or similar. Avoid TP-Link TL-WN722N v2/v3 – they use a
If you see nothing, your adapter is either not connected or not recognized. NetworkManager and other services can block the interface. If you see nothing, your adapter is either
sudo systemctl restart NetworkManager Sometimes Fern fails to switch the card to monitor mode automatically. Do it manually:
After running Fern, you can restart networking with: