Questions about WPS

Sam Leffler sleffler
Tue Jan 5 07:52:44 PST 2010

On Wed, Dec 30, 2009 at 2:51 AM, Marcel Holtmann <marcel at>wrote:

> Hi Jouni,
> > > Does WPS suppose to support access points that are configured with WEP?
> >
> > In theory, yes, but in practice, you would probably be better off
> > ignoring it and just assuming it does not..
> >
> > > I have seen some APs with WEP encryption enabled and still containing
> > > the WPS IE in its scan results. Seems the IE is cut down to version
> > > details only, but never less the IE is present.
> >
> > There are known interoperability issues with the way WPS with WEP
> > encryption is implemented (or not implemented at all).
> >
> > > Will WPS work also with IEEE 802.1x / EAP? Or is it just PSK key
> > > management only. So is WPS a WPA-Personal only feature or would it also
> > > apply to WPA-Enterprise?
> >
> > Again, in theory, WPA-Enterprise could be supported. However, I'm not
> > aware of anyone implementing support for it and as such, I would suggest
> > assuming that you can only use WPS to configure WPA/WPA2-Personal (and
> > open networks for that matter, if you really want to use WPS for it).
> everything that I found on the Internet so far, was just talking about
> PSK anyway. So either with WPA/RSN with PSK or ignore WPS. Sounds good
> enough for me.
> Initial testing with some of the WPS capable access points here also
> reveals that they don't really bother to update the IE correctly.
> So telling if WPS is actually usable or if WPA/RSN has been manually
> configured is kinda hard.

I thought updating the IE was part of the spec and ap's that don't can't
pass certification--but it's been a while and I'm not sure I read the final
version.  Perhaps it got moved to a manual step (i.e. you manually bring the
ap out of this mode).

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