Clarification about re-authentication and pre-authentication

[Helmut Schaa]

Am Freitag 10 September 2010 schrieb Panagiotis Georgopoulos:
> Why is there a rsn_preauth_interfaces option in hostapd.conf? The interface
> option that the machine is using to create the AP is not enough? The client
> that will try to do pre-authentication will try to connect to the access
> point anyway.

That's because the preauthentication doesn't happen over the air but over the
DS. It looks like this:


    <- wifi -> AP1 <- DS ->
STA                         AP2
    <- preauthentication ->

And hostapd on AP2 needs to know on which interface preauthentication requests
can come in (for example over eth0).

HTH,
Helmut