[Dnsmasq-discuss] dnsmasq not offering dhcp

Solomon White solomon.white at comcast.net
Mon Apr 7 05:04:57 BST 2008


I think this is Linux-specific, and I'm on OpenBSD.  Any other ideas I could
use to troubleshoot this?

Thanks,

Solomon

On Mon, Mar 24, 2008 at 6:18 PM, Robert Diamond <deadram at gmail.com> wrote:

> On Mon, 24 Mar 2008 11:53:22 -0600
> "Solomon White" <solomon.white at comcast.net> wrote:
>
> > I'm trying to get dnsmasq set up as the DNS / DHCP provider for my
> > home LAN.  It's working for DNS, but I'm not getting DHCP offers when
> > I send discover requests.
> > ...
>
> Sounds to me like this "filtering" of dhcp requests is going down in
> the kernel space. Check /proc/sys/net for options to the kernel that
> may need turning on/off. As a side note (might help in this case), my
> kernel echo's "martian" packets (ie: packets which should not be sent to
> a particular interface, but end up there). dhcp requests always
> generate martian logs on my network. Maybe you have pf set-up to drop
> these martian, like in this pesuedo example
>
> if (in-iface == eth0) && (src/dst ip != 192.168.1.1) ; then
>        drop
> fi
>
> Maybe you just have some strict settings turned on in /proc/sys that
> drop broadcast packets, or martian packets.
>
> --
> Robert A.M. Diamond
>  <deadram at gmail.com>
>      http://robshouse.no-ip.info
>
>
> Mr. Scorpio says productivity is up 2% and it's all because of my
> motivational techniques, like donuts and the possibility of more
> donuts to come.
>
>                -- Homer Simpson
>                   You Only Move Twice
>
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