Re: iptables and dhcp
From: /dev/rob0 (rob0_at_gmx.co.uk)
Date: 09/16/03
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Date: Mon, 15 Sep 2003 18:14:37 -0700
In article <92ead774359dc26b955b110d8ab84cd5@news.teranews.com>,
Dave Lister wrote:
> DHCP requests are passing through my firewall to the next higher server in
> the network. These requests seem to be alternatively serviced by my
Are you running a DHCP relay? Or are these would-be DHCP clients on the
same physical network segment as the firewall and the remote DHCP
server?
> I've tried blocking ports 67 and 68 with iptables, and it still gets passed
> through and serviced. I've tried blocking everything in both directions and
> it still gets passed through.
>
> Any ideas?
I'll bet if you showed us your rules we could show you exactly where and
why they're wrong. Here are some guesses in advance:
1. You used INPUT and not FORWARD chain
2. You used -p tcp and not -p udp
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