[Dnsmasq-discuss] Decouple DHCP and DNS

Simon Kelley simon at thekelleys.org.uk
Thu May 24 16:48:33 BST 2007


Daniel Mentz wrote:
> I'm using dnsmasq as a DNS and DHCP server.
> 
> As described in the manual page, dnsmasq is answering DNS queries for
> hosts it granted DHCP leases to.
> 
> Let me give you an example to clarify this:
> 
> My host daniel-desktop is assigned ip address 192.168.10.5 from dnsmasq
> via DHCP. From now on, DNS queries for host "daniel-desktop" will be
> answered with 192.168.10.5 by dnsmasq. My question is: How can I disable
> this behavior. I do not want dnsmasq to inject anything into the DNS
> namespace because I'm running an instance of BIND to serve the names of
> my local network.
> 
> In other words: How can I configure dnsmasq to NOT reply with
> information from the DHCP leases file.

First, don't provide any name information in dhcp-host lines, 
/etc/ethers or /etc/hosts.

Second, add

dhcp-ignore-names

to /etc/dnsmasq.conf, which will stop dnsmasq from using any name 
information provided by the DHCP clients themselves.


HTH

Simon.

> 
> Thanks
>  Daniel
> 
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