dhclient (possibly all networking) not working with some routers and WPA

[Bernhard Schmidt]

On Wednesday, March 09, 2011 02:00:40 Michael wrote:
> Hi,
> 
> I'm running FreeBSD 8.1-Release with ath0 card. For some unknown reason 
> this laptop is not able to get IP address from my access point (DHCP) if 
> WPA encryption is enabled.
> 
> The tricky part is that it says it is associated but has IP of 0.0.0.0. 
> So it looks like encryption part is working and then other communication 
> fails.
> 
> Everything works fine if I switch the encryption off.
> The same station works fine with other access points. Other operating 
> systems works fine on the same station with the same access point. And 
> the same access point works fine with other stations.
> In short - it's only FreeBSD that is having problems in this setup.
> 
> What I have tried and it didn't help:
> - using FreeBSD 8.0-R and 8.1-R
> - using isc-dhcp41-client and isc-dhcp31-client from ports
> - turning on/off different QoS settings on the access point
> - adding my station to static IP table on the access point
> - configuring ip address, netmask and routing table manually on my 
> station with DHCP server both enabled and disabled
> - using different access points - two out of four are not working, all 
> different makes and models
> 
> [..]
> 
> I'm quite desperate to get it fixed so any ideas/suggestions appreciated.

Do I get that right? You've tried setting a fixed IP? Can you also run
tcpdump on a remote side? How does your wpa_supplicant.conf look like?
Do you have any other device available? an USB wlan stick or something
to rule out the Atheros hardware.

-- 
Bernhard