[Dnsmasq-discuss] Multiple server interaction with multiple subnets

Data Control Systems - Mike Elkevizth mike at dcsamerica.com
Wed Dec 6 21:48:16 GMT 2006

Sorry, this doesn't really help because the dns queries are done without a
domain extension. Some of the workstations are notebooks that can move
around from subnet to subnet. I would like it to be that the user doesn't
have to know a separate domain name for each location if possible. I have
thought about doing it this way, but it would make it more difficult for the
users, which I would like to try and avoid. If this is my only option
though, I will have to live with it. Let me know if you have any other

Thank You,

Mike Elkevizth

-----Original Message-----
From: dnsmasq-discuss-bounces at lists.thekelleys.org.uk
[mailto:dnsmasq-discuss-bounces at lists.thekelleys.org.uk]On Behalf Of Jeb
Sent: Wednesday, December 06, 2006 4:06 PM
To: dnsmasq-discuss at lists.thekelleys.org.uk
Subject: Re: [Dnsmasq-discuss] Multiple server interaction withmultiple

Data Control Systems - Mike Elkevizth wrote:
> Thank you for the response. I am not really sure how the DHCP-relay works.
> The main reason I haven't tried this before, and I will study into that
> option, is that the subnets are connected through a VPN. They are three
> separate router boxes all connected through the internet. There is a high
> probability that these connections can be down for some periods of time
> where the servers cannot communicate with each other. While I would love
> say that this won't happen, it will, and I would like each subnet to still
> be able to continue working (workstations on the local subnet
> with the local server) even when this occurs. I believe that the relay
> probably not be able to pass out DHCP addresses if it loses connection
> the main DHCP server (this is what I will look into). So if you know a way
> to set up multiple dnsmasq to do what I was looking for I would still
> appreciate a quick how-to

If your setup looks something like this: -> .subnet1.mydomain.org -> .subnet2.mydomain.org -> .subnet3.mydomain.org
(so you might have hostA.subnet1.mydomain.org, etc)

Then each dnsmasq server can direct queries about subnetX.mydomain.org
to the correct server.

See this part in the conf:
# Add other name servers here, with domain specs if they are for
# non-public domains.

Does that help?

Jeb Campbell
jebc at c4solutions.net

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