sudo airmon-ng check kill Or manually:
sudo aireplay-ng -9 wlan0mon You should see: install atheros ar9271 driver kali linux
echo 'options ath9k_htc nohwcrypt=1' | sudo tee /etc/modprobe.d/ath9k_htc.conf AR9271 typically supports 20–30 dBm. Check current: sudo airmon-ng check kill Or manually: sudo aireplay-ng
echo 'options usbcore autosuspend=-1' | sudo tee /etc/modprobe.d/usb-disable-autosuspend.conf sudo update-initramfs -u sudo reboot If you are running an extremely old kernel (before 3.0) or a custom kernel, you can build the backports driver. Note: This is rarely needed for modern Kali (2020+). Step-by-step build: sudo apt install git build-essential linux-headers-$(uname -r) git clone https://github.com/greyhats/backports-ath9k-htc.git cd backports-ath9k-htc make defconfig-ath9k make sudo make install sudo reboot Warning: Building drivers manually may break when Kali updates its kernel. Prefer the native solution. Part 5: Post-Installation – Enabling Monitor Mode and Packet Injection Once your AR9271 driver is active, you’ll want to use its legendary capabilities. Step 1: Kill Interfering Processes Network managers can block monitor mode. Step 1: Kill Interfering Processes Network managers can
lsusb Look for an entry containing "Atheros Communications, Inc." or "TP-Link". Example output:
iwconfig wlan0 | grep "Tx-Power" Set to maximum (usually 30):
However, a common point of confusion, especially for newcomers to Kali Linux, is the misconception that the AR9271 driver needs to be "installed" manually. In reality, the situation is more nuanced.