[Dnsmasq-discuss] Random IP address in the pool with dhcp-script?

SamLT samuel.lethiec at intelunix.fr
Sat Aug 28 10:42:48 BST 2010


On Sat, Aug 28, 2010 at 11:18:29AM +0200, Benjamin Henrion wrote:
> On Fri, Aug 27, 2010 at 11:23 PM, Rance Hall <ranceh at gmail.com> wrote:
> > On Thu, Aug 26, 2010 at 7:11 AM, Benjamin Henrion <bh at udev.org> wrote:
> >> Hi,
> >>
> >> I am trying to figure out howto give a different IP address,
> >> preferably random, in a pool, by invoking the dhcp-script.
> >>
> >> Any idea how to do that?
> >>
> >> Best,
> >>
> >> --
> >> Benjamin Henrion <bhenrion at ffii.org>
> >
> >
> > Maybe I'm reading this wrong, but since the original assignment from
> > the dhcp pool is reasonably random, and after than dnsmasq works very
> > hard to offer the same IP address to the same machine based on mac
> > address or hostname or some other network characteristic that is
> > configurable.  I'm taking your question to mean is there a way to
> > force dnsmasq to give out DIFFERENT IP addresses even if we've
> > processed this machine before.
> >
> > If this is what you want, then you might need to explain the problem
> > you are trying to solve, because generally this is undesired behavior,
> > at least it is on the networks I manage.
> 
> The way I solved it was the following:
> 
> 1. Create a series of dnsqmasq config files with a different subnet
> 2. KIllall dnsmads and start another dnsmasq to loop over them every 120sec
> 3. Redure the lease time to 2m
> 
> A bit hackish, but it works.
> 

This totally explains what you were trying to do, thanks for helping us helping
you...




> --
> Benjamin Henrion <bhenrion at ffii.org>
> FFII Brussels - +32-484-566109 - +32-2-4148403
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> Instead of explicitly seeking to sanction the patentability of
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> court, which would establish and enforce patentability rules in their
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> democratically elected legislators."
> 
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