[Dnsmasq-discuss] disable Router does not work

[Matt Hull]

not sure if you want to block at all, but that might be better done in
iptables.

On Thu, 17 Aug 2006, [ISO-8859-1] Jürgen Steinel wrote:

> Hi,
>
> today I wanted to disable routing for a single host. That machine gets
> its IP from dnsmasq.
>
> In the dnsmasq.conf I added an entry to assign the host to a
> network-group and set an option for this group that should disable the
> gateway.
>
> dhcp-host=<host>,<ip>,net:norouting
> dhcp-option=norouting,3,0.0.0.0
>
> Unfortunately this did not have the expected effect. The host got the IP
> mentioned in dhcp-host but was still told where the (actual) router is.
>
> I captured the dhcp-request/reply to make sure the Information came from
> dnsmasq (and was not cached by the client). Dnsmasq *did* deliver the
> Information.
>
> To test if dhcp-option does anything at all I changed the above line to
> this:
>
> dhcp-option=norouting,3,1.2.3.4
>
> After requesting a new IP the client got 1.2.3.4 as default gateway.
>
>
> I think this behaviour is wrong (=ignore option if given IP is 0) and
> even if it is intented it should be mentioned in the manual.
>
> Is there a different way to set an option to a zero-value?
>
> -Jürgen
>
>
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