Issue with DHCP with Wireless card

Hugh McLenaghan hughmcl at
Wed Mar 12 22:42:44 CET 2014

Yeah.   Strange thing is that I'm sure I had it working at one point.  Doesn't really make sense to me.  It appears to be doing what it's supposed to be, but for some reason the packet isn't being sent out by the card or being seen on the card/interface.

Going to try it on another Pi to see if somehow some library somewhere got mixed up.


> Date: Wed, 12 Mar 2014 21:14:22 +0000
> From: mcn4 at
> To: freeradius-users at
> Subject: Re: Issue with DHCP with Wireless card
> On Wed, Mar 12, 2014 at 02:44:37PM -0500, Hugh McLenaghan wrote:
>> I'm hoping that the issue is something simple I've done wrong or missing.
> Doesn't help much, but I just tested with a WLAN card in my Linux
> desktop (TP-LINK TL-WN772N, Atheros AR9271) and it worked straight
> away; assigned an IP to my tablet, and saw the packets in tcpdump.
> It also worked on a Netgear WLAN card, also supposedly the same
> chipset, though it's not a good card. When a DHCP Discover got
> through, though, the Offer was successfully sent.
> I'll see if I can dig out the Pi to test, but this may take a
> while as I've not fired it up for a bit.
> So it doesn't look like a problem with DHCP over a wireless
> interface in general.
> Matthew
>> ----------------------------------------
>>> Date: Wed, 12 Mar 2014 14:00:07 -0400
>>> From: aland at
>>> To: freeradius-users at
>>> Subject: Re: Issue with DHCP with Wireless card
>>> Hugh McLenaghan wrote:
>>>> Starting FreeRADIUS:Wed Mar 12 11:10:22 2014 : Info: radiusd: FreeRADIUS Version 3.1.0 (git #b71e353), for host armv6l-unknown-linux-gnu, built on Mar 12 2014 at 01:50:59
>>> Please use v3.0.2 branch. The "master" branch is undergoing heavy
>>> development. And also use "radiusd -X". Using "-Xx" doesn't help.
>>> Are you running this as root? The DHCP code requires that for proper
>>> operation. You should also set the "interface" entry in the listen
>>> section for dhcp. That will tell it to receive / send packets on the
>>> correct interface.
>>> Alan DeKok.
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> --
> Matthew Newton, Ph.D. <mcn4 at>
> Systems Specialist, Infrastructure Services,
> I.T. Services, University of Leicester, Leicester LE1 7RH, United Kingdom
> For IT help contact helpdesk extn. 2253, <ithelp at>
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