Re: linux-only "freshness" auth problem??

[Johannes Berg <johannes@sipsolutions.net>]

> > Do you see any *kernel* messages after this? I'm half expecting to see
> > that the beacon never arrives, or something like that?
> 
> The kernel log is repeated.  The next log line is again scanning start,
> since NetworkManager (or wpa_supplicant, I'm not familiar with the machinery
> involved) request scan again.

Ok, that's interesting.

> > Are the hotels running similar equipment perhaps? If rebooting the AP
> > helps then perhaps the APs aren't actually beaconing quite properly -
> > maybe you could put the card into sniffer mode (monitor mode) and
> > capture what's going on over the air for a bit after this happened?
> 
> Can you give some more specific comments please?  We just rebooted the
> AP the next time, it all started working again, and I need to install
> all the necessary tools while it is working ;)  Since I'm not familiar
> with wifi machinery, maybe you can give me specific command lines to
> run? :)

Oh, well, there's some information here:

https://wireless.wiki.kernel.org/en/users/documentation/iw

iw wlan0 set type monitor
iw wlan0 set channel X
ip link set wlan0 up
tcpdump -i wlan0 -s0 -w /tmp/dump

could capture this on another machine.

johannes