Client disconnection at PTK renewal

Jouni Malinen j at
Mon Oct 14 13:34:03 EDT 2013

On Fri, Oct 11, 2013 at 04:39:06PM +0200, Adrien Decostre wrote:
> I am running hostapd 2.0 on a kernel 3.11.2 with the ath9k driver and
> I am experiencing occasional disconnections at the moment of the PTK
> renewal.
> I have seen this issue with different kind of WiFi clients so I am
> suspecting that there is something wrong at my access point setup.
> Hostapd disconnects the clients because it reaches the retry limit for
> the EAPOL frame transmission. Apparently, the different clients I
> tested were working correctly but they never received the EAPOL frames
> coming from hostapd.

If the message 4 of 4-way handshake is not received, disconnecting the
station is the expected and correct behavior. I wireless capture of the
exchange would be needed to determine what happened with this message
that the AP side did not seem to receive or at least deliver to hostapd.

Jouni Malinen                                            PGP id EFC895FA

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