Wireless works, but no route to host

[oneman]

On 22-aug-2008, at 15:21, Mark Haney wrote:

> oneman wrote:
>> Hi All,
>>
>>
>>
>> I have Ubuntu 8.04 Hardy amd64 installed on a HP Compaq 6910p. It has
>> a wireless controller that shows up in lspci like 'Broadcom
>> Corporation BCM4312 802.11a/b/g (rev 02)'. I installed and activated
>> the non-free driver and it can establish a connection with my
>> wireless AP (an airport extreme, in bridged mode), gets an ip ,
>> gateway etc. through DHCP.
>>
>
>>
>> I'm not sure where to look. Googleing didn't result in anything
>> usefull. Any advice on where to look?
>>
>
> You didn't really tell us what the signal strength is between the card
> and the AP.

It's about 90% at least, that's what the systemtray icon tells me.

>
> It could also be that the protocol used isn't enabled on the AP, (I
> usually turn 802.11b off).
>
If that were the case, I would not be able to get dhcp giving out ip,  
gateway etc

> What kind of traffic are you actually seeing on the card?  What does
> tcpdump or wireshark show?  Those packets may be nothing more than the
> wireless card send out requests for a good AP protocol.  Is the AP
> secured?  Do you have the correct encryption passphrase?

It's not the connection to the AP itself, that seems to work. The  
connection is there, the dhcp server can be reached. The dhcp server  
is not the AP itself but on the router behind it.
>
> I mean, it really could be anything.

The problem as far as I can tell is that the applications trying to  
use the connection somehow fail to do so.

So, why could it be that my applications like ping or the browser  
don't actually use an active network connection? There's no other  
connection, the cable is disconnected. Could it be that it fails to  
somehow 'publish' this new active interface to the applications?


Thx,

Peter
>