[RTW8821CE] Attempting to create RFMON interface with active flag causes interface to be stuck down.

[c0des1ayr]

I'm using a laptop, and trying to make wlan0mon with the active flag makes it impossible to set the interface to up, making it useless for Open Wireless Link. Is it an issue due to back-porting, or just an upstream issue?

[dubhater]

rtw88 doesn't support active monitor mode. Maybe it could support that, but I haven't investigated yet. It depends on whether Realtek's firmware wants to cooperate or not.

[dubhater]

Oh, wait. In this repository rtw88 advertises support for active monitor mode. Larry did that for testing purposes, I guess, but it doesn't work.

[c0des1ayr]

I only made the issue because the module from this repo added Device supports active monitor (which will ACK incoming frames) to iw phy's output, and I could create the interface with the flag.

[morrownr]

@c0des1ayr

Your best bet for a WiFi 5 class adapter that supports active monitor mode is an adapter with a mt7610u or mt7612u chip. There are several listed in my Plug and Play List:

https://github.com/morrownr/USB-WiFi

@dubhater

Larry did that for testing purposes, I guess, but it doesn't work.

It might be best if the false support is reverted. Do you want me to investigate?

FWIW: I have never seen AMM in any Realtek driver.

[dubhater]

@morrownr Sure, thanks!

[morrownr]

@dubhater

Sure, thanks!

Active Monitor Mode is gone. I think you were right, Larry was just trying to see if there was any code to support it.

[c0des1ayr]

Alright, I'll get an external WNIC instead.

[morrownr]

@c0des1ayr

https://github.com/morrownr/USB-WiFi/blob/main/home/Recommended_Adapters_for_Kali_Linux.md

Any of the mt7612u and mt7610u based adapters should work fine. The one I have recommended the most to those using monitor mode and needing AMM is the Alfa ACHM. The ACM is really good also but does not quite have the range of the ACHM.

If you want something more modern the Edup adapter should work well but AMM appears to currently be broke in the driver. Hopefully that gets fixed.