[Dnsmasq-discuss] DHCP request not getting to dnsmasq

Guennadi Liakhovetski g.liakhovetski at gmx.de
Tue Dec 25 13:47:28 GMT 2007


On Tue, 25 Dec 2007, Robin Atwood wrote:

> On Tuesday 25 Dec 2007, you wrote:
> > > > do you have any iptables rules active?
> > >
> > > Oh yes! But anything is accepted on the 192.168.0.0/255.255.0.0 sub-net.
> > > We can see the bootp packet is getting through to my server.
> >
> > Don't know if any iptables rule can get between tcpdump and an
> > application...
> 
> Ok, I have fixed it! :) I put in an explicit iptables rule for dport=bootps 
> and protocol=udp and it all sprang into life. Anyone know why the rule
> 
> -A block -s 192.168.0.0/255.255.0.0 -j ACCEPT 
> 
> was not sufficient? It works for all the other protocols.

Of course not. As your laptop sends a dhcp request it doesn't have an IP 
yet... Wondering how your other clients work.

> Thanks to everyone who responded, particularly Guennadi who got my brain 
> turning over. Now for Christmas dinner!

You're welcome. Merry Xmas:-)
Guennadi
---
Guennadi Liakhovetski



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