[Dnsmasq-discuss] DHCP setup

[Stefano Bridi]

I suppose you are using bridged VPN (same subnet in every city) so if
you are already in a routed setup drop my email in the recycle bin and
please describe better the setup

I dont' know if there are settings in dnsmasq to help you in this
specific situation..
Anyway you can solve migrating the infrastructure to a routed VPN (big step)
Or at least you can filter out the DHCP request from the vpn.
A routed setup give you more control and don't forward broadcast
everywere, off course you need DNS/WINS working.

Stefano


On Mon, Oct 4, 2010 at 3:15 AM, Philippe Faure <philippe at faure.ca> wrote:
> Hello,
>
> I didn't hear back from anyone, so I thought that I would try to see
> if my request makes sense.
>
> I have dnsmasq running on 3 separate servers, each in different
> cities.  They are all connected via a secure tunnel. I was finding
> that DHCP request made in location A is being answered by the DHCP
> server in location B.
>
> Currently to avoid this issue, I am using:
> dhcp-host=00:0e:35:f6:d8:af,ignore
>
> as a way to stop server B handling requests that typically should be
> handled by server A. This means that each time new hardware is brought
> online, the dnsmasq.conf files need to be updated in the other two
> locations so that they ignore hardware that doesn't belong to them.
>
> Do you know if there is a better way of handling this issue? Since what
> does happen from time to time, is that devices normally associated
> with Location A do visit Location B. so hen the DHCP assignment comes
> from the hardware's home location, and not the closest server.
>
> Is there a way to use the IP of the local router to accept DHCP
> request, if the request comes from a router from a different location,
> pr the tunnel then ignore that request?  I believe that this would be
> a cleaner solution, but just not sure of how to implement it. Even if
> it is possible.
>
> Thank you
>
> Philippe
>
>
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