Forum Thread: Whenever I Try "Airmon-Ng Start wlan0" There's an Error?

Google it pal, should help.

The error I asked above comes up whenever I type "airmon-ng start wlan0" which is:

"wlan0 is hard blocked, please flip the hardware wifi switch to on.
It may also be possible to unblock with "rfkill unblock wlan0"
Detected VM using dmiinfo
This appears to be a VirtualBox Virtual Machine
Some distributions have bugs causing rfkill hard block to be forced on in a VM.
If toggling the rfkill hardware switch and "rfkill unblock wlan0" both fail
to fix this, please try not running in a VM.
rfkill error, unable to start wlan0

Would you like to try and automatically resolve this? y/n y

Failed to set wlan0mon up using ip

(mac80211 monitor mode vif enabled for phy0wlan0 on phy0wlan0mon)
(mac80211 station mode vif disabled for phy0wlan0)"

So I tried "rfkill unblock wlan0"

It says "Bogus unblock argument 'wlan0'.

Then I type "iwconfig"

And suddenly it says "wlan0mon" Mode: Monitor.

However even though it's somehow on Monitor mode I can't execute the command "airodump-ng wlan0mon" Because if I do, this comes up

"ioctl(SIOCSIFFLAGS) failed: Operation not possible due to RF-kill"

Sorry for the long reply!

have the message :
wlan0 is soft blcoked, please run "rfkill unblock 1" to use this interface.
rfkill error, unable to start wlan0
as i run:
airmon-ng start wlan0
so i can't go on anymore..
any fix??

"Maybe do what it tells you and use 'rfkill unblock' to unblock your device". Seriously! Why don't you read what the program tells you??? That can contain the fix for the problem. Not to say, that if you actually used Google and not just forum websites, this would be fixed already!

Try running "airmon-ng check kill" then airmon-ng start wlan0

Tried that, however the error "ioctl(SIOCSIFFLAGS) failed: Operation not possible due to RF-kill" now comes up.

Thanks for your answer

Hey Jun,

• Fix RFKILL Hard Block

just add this line in blacklist.conf in /etc/modprobe.d/
"blacklist wmi"

• Permanently Fix airmon-ng monitor mode error

I just covered a similar issue with aircrack-ng on my blog post.

Here you can head over to "Resolve Airmon-ng and network manager issue" section. There is the solution for this issue which'll help you fix network manager so that you donot have any need to run "airmon-ng check kill" everytime.

Just airmon-ng start wlan0
and you are good to go.

Go here

I hope it helps.

It doesn't help, but thanks though!

Try:

iwconfig wlan0 down
ifconfig wlan0 mode monitor
iwconfig wlan0 up

airodump-ng start wlan0

I had the same error as OP, you fixed the issue for me thanks bud.

Thanks alott broo! This is very helpfull. I got stuck on this error for like 3 hours!! U just saved my day

I get this :

ailed to set wlan0 up using ip
(mac80211 monitor mode already enabled for phy0wlan0 on phy0wlan0)

Using termux on my arm64 8core phone after running: sudo airmon-ng start wlan0 I get:
ERROR adding monitor mode interface: command failed: No space left on device (-28)
Can anybody help me out. Thanks in advance.