linux-kernel - Re: DHCP and iptables

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Message-Id: <200910121848.45005.arnd@arndb.de>
Date:	Mon, 12 Oct 2009 18:48:44 +0200
From:	Arnd Bergmann <arndbergmann@...glemail.com>
To:	lkml@...ubi.at
Cc:	linux-kernel@...r.kernel.org
Subject: Re: DHCP and iptables

On Monday 12 October 2009, lkml@...ubi.at wrote:
> The last few days I have been wondering about the fact, that I get an IP
> address via
> DHCP if all chains at iptables are set to drop and no accept rules set.
> 
> Does this happen on purpose?

DHCP is an ethernet protocol, not an IP protocol, so you have to use
ebtables instead of iptables to filter it.

	Arnd <><
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