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wpa_supplicant considered helpful (was: wpi0 going offline frequently)
On Tue, 19 Feb 2008 00:16:21 +0200
Alan Barrett <apb%cequrux.com@localhost> wrote:
> On Mon, 18 Feb 2008, Steven M. Bellovin wrote:
> > The wpi0 problem is a major annoyance.
> I have noticed that just keeping a wpa_cli instance open all the time
> stops the wpi0 interface from going down so often. Since I started
> doing so, I don't remember seeing any complaints from a script that
> monitors the status and does "ifconfig wpi0 down up" when necessary.
Let me follow up on that with a new observation. I recently started
running wpa_supplicant, even though most of the nets I use are either
unprotected or use WEP. wpa_supplicant doesn't prevent the problem,
but it does make the interface recover automatically, and often do so
very quickly. Furthermore -- and this is the really strange part --
running wpa_supplicant let me connect to unprotected networks that I
was unsuccessful at connecting to with out. I saw this quite clearly
at the Minneapolis IETF meeting, where there are *many* access points.
I was virtually unable to connect; wpi0 just wouldn't latch on to a
carrier. When I ran wpa_supplicant, though, it all just worked.
"Magic is loose in the world".
--Steve Bellovin, http://www.cs.columbia.edu/~smb
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