hostapd leaving out 'zombie' accesspoint after killing it with crtl+c

Jouni Malinen j at
Sun Mar 26 02:02:57 PDT 2017

On Tue, Mar 21, 2017 at 02:30:43PM +0000, Wojciech Żyszczyński wrote:
> I am running hostapd 2.6 on centos 7. I start it and the SSID is being
> broadcasted.
> What puzzles me, if I terminate the hostapd process with CTRL+C in the
> console, the SSID is still being broadcasted.

Which driver and Wi-Fi hardware are you using?

> The zombie SSID is visible in the scan results and connection can be
> attempted. It always fails though.
> My guess is that 'hostapd does not shutdown the Access Point at the
> wifi driver level'.

hostapd does stop the AP when allowed to do so.. Ctrl-C in general
should allow this (while SIGKILL would not). Can you share a hostapd
debug log (-dd on command line) from an example where the beacon frames
continued to be transmitted after Ctrl-C?

Jouni Malinen                                            PGP id EFC895FA

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