ignore unknown mac addresses via dnsmasq

[Sameer Verma]

On Wed, Apr 7, 2010 at 11:15 AM, David Van Assche <dvanassche at gmail.com> wrote:
> why not just continue to get dhcp addresses from the main dhcp machine, but
> set the nbdroot=your.ltsp.server:port in the pxe.linux.cfg/default file.
>

David,

Two questions: 1) I presume I continue to run dhcpd. What do I need to
do in its conf to serve clients a LTSP image via pxeboot, but ask it
to get its own dhcp IP from campus? 2) How do I prevent others from
getting dhcp IPs from my dhcp server?

Sameer

> I do this when u cant control the dhcp server, and it works ok... the only
> issue might be DNS, but in theory, if the XP machines are getting DNS via
> dhcp, u should be able to as well.
>
> kind regards,
> David Van Assche
>
> On Wed, Apr 7, 2010 at 7:19 PM, Sameer Verma <sverma at sfsu.edu> wrote:
>>
>> So, our campus IP folks came by over the Spring break and "upgraded"
>> our network and broke the LTSP lab setup completely. We cannot run our
>> own DHCP server and serve private IPs anymore. Each client, which is a
>> full XP machine is connected to the campus network and must get its IP
>> from the campus DHCP server (totally off limits for us).
>>
>> So, we are going to switch over to proxy DHCP using dnsmasq.
>> https://help.ubuntu.com/community/UbuntuLTSP/ProxyDHCP
>>
>> The lab has 33 machines connected to a switch. The LTSP server
>> (eth0=public IP) is also connected to this switch. How do I restrict
>> pxeboot of the 33 machines from LTSP and not to everyone else in the
>> bldg? Note that as per the instructions at
>> https://help.ubuntu.com/community/UbuntuLTSP/ProxyDHCP we've removed
>> dhcp and installed dnsmasq. We have a list of MAC addresses for all 33
>> machines. Where do these get specified?
>>
>> Any help would be much appreciated.
>>
>> I've looked into the dhcp-ignore=#known option, but no luck as yet. Is
>> anybody using dnsmasq?
>>
>> cheers,
>> Sameer
>>
>> --
>> Dr. Sameer Verma, Ph.D.
>> Associate Professor, Information Systems
>> Director, Campus Business Solutions
>> San Francisco State University
>> http://verma.sfsu.edu/
>> http://cbs.sfsu.edu/
>> http://is.sfsu.edu/
>>
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