In the past when perfoming a wifi audit it was common to know that the alfa was a must to have usb device, but at that time all wifi were 2.4Ghz. Today most of the Access points are dual band and sometimes we need to see the 5ghz during a pentest or security monitoring.
Right now the best chip that has monitor mode and allows to inject packes is the RTL8812AU, which of course alfa has a dual band model.
Uses the RTL8812AU chipset which allows to have dual band.
This usb wifi dongle has high power which competes head to head with the Alfa AWUS036ACH.
The usb device is very nice and comes with two antennas with sma connectors.
The bad thing we notice after opening the package is that you can't use most of the antennas, since the RP-SMA is too deep and it makes impossible to fit it. You can use a sma connector extension which of course will fit inside the hole, buy you will to buy it or build it by yourself.
The device supports the follow IEEE standards:
- IEEE 802.11ac
- IEEE 802.11a
- IEEE 802.11n
- IEEE 802.11g
- IEEE 802.12b
We tried to use the wifi device with Kali and it was added support on Kali 2017.1, the device worked out of the box including packet injection. If you are using Ubuntu you can try to compile drivers manually:
git clone -b v4.3.21 https://github.com/astsam/rtl8812au.git cd rtl8812au make RTL8811=1 DEBUG=1 sudo make install
We also tried with Raspbian 8 (jessie) and we have to manually compile the drivers.
To install the TP-link Archer T4UHP on a raspberrypi try the following commands:
sudo wget https://raw.githubusercontent.com/notro/rpi-source/master/rpi-source -O /usr/bin/rpi-source && sudo chmod +x /usr/bin/rpi-source && /usr/bin/rpi-source -q --tag-update sudo apt-get install bc rpi-source cd /tmp git clone https://github.com/abperiasamy/rtl8812AU_8821AU_linux.git cd rtl8812AU_8821AU_linux make -f Makefile.dkms install
If you have an error about a missign a armv6 or v7, try to create the symbolic link:
cd /home/pi/linux-be2540e540f5442d7b372208787fb64100af0c54/arch sudo ln -s arm armv6l
We got the usb device at very good price and we are pretty happy with it. If you are planning to use the default antennas or use a bug antenna the RP-SMA connector will not be an issue. If you find the this usb device at the same price as the alfa, you should go to the alfa. We bought it with a great discount. The device has a great look also.