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Old 09-23-2011, 12:29 PM   #1
Adam Jensen
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No DHCP offers received when trying to connect to an Open wireless network


Hi, I'm a new user. I'm trying to connect to an open wifi network and when I try to request the IP address with "dhclient" command i get no DHCP offers from the AP. When I try to connect to AP with "iwconfig wlan0 <AP bssid>" command and then try to check the connection with "iwconfig wlan0" command, the output says "not connected to AP". The wireless card works, and I can connect to this network on Windows. I've red this could be simply due to the eccessive distance from the AP. Is this the case, or what?
 
Old 09-24-2011, 09:41 PM   #2
frankbell
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What kind of wireless chipset does the computer have? Some of them in some distros require a little extra work to get functioning in Linux.

Running the command lspci (list pci in a terminal window should answer that question; post the results for the wireless here. Note that the brand of wireless card may or may not indicate what chipset is inside that card.
 
Old 09-26-2011, 01:04 PM   #3
Adam Jensen
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Result of lspci: 08:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61).
I'm on Backtrack 4 live distro, airodump can see the networks, but still I can't associate to the open one.

Last edited by Adam Jensen; 09-26-2011 at 01:05 PM.
 
Old 09-26-2011, 08:43 PM   #4
frankbell
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I was able to find a thread on the Ubuntu forums that might help, even though it does refer to an older version of Ubuntu:

http://ubuntuforums.org/showthread.php?t=1118935

It does seem to be a rather unusual problem. A web search turned up little.

Can you connect to an unsecured network, as at a coffee shop or something?
 
Old 09-30-2011, 01:09 PM   #5
Adam Jensen
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I can, but not using Backtrack, only using Windows. I checked out your link, and it seems like the guy can't use at all his card, instead I can see all the networks, but simply can't to be associated to them, even the opened ones. I guessed it was just a distance issue, but I can connect to the same network in Windows. Iwlist scan get nothing, but airodump is able to see all the networks.

Last edited by Adam Jensen; 09-30-2011 at 01:21 PM.
 
Old 09-30-2011, 07:47 PM   #6
frankbell
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If you are indoors and more than a hundred feet or so from the source, it could easily be distance-related.

This article seems to explain it pretty well:

http://compnetworking.about.com/cs/w.../wifirange.htm
 
Old 10-07-2011, 04:41 PM   #7
Adam Jensen
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Thank frank!
 
  


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