From mboxrd@z Thu Jan 1 00:00:00 1970 From: besteinm@phys.ethz.ch (Benoit Steinmetz) Subject: dhcp weirdness with iptables Date: Tue, 23 Sep 2003 16:09:33 +0200 Sender: netfilter-admin@lists.netfilter.org Message-ID: <20030923140933.GA22498@phys.ethz.ch> Mime-Version: 1.0 Return-path: Content-Disposition: inline Errors-To: netfilter-admin@lists.netfilter.org List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: netfilter@lists.netfilter.org hi i get my ip address from a dhcp server. i have experienced strange behaviour of my iptables-firewall: it seems that the dhcp packets seem to be unaffected by the firewall, because, no matter how restrictive i setup the firewall, the udp packets coming from port 67 on the dhcp-server and going to the local port 68 pass through. has this something to do with the linux socket filter (CONFIG_FILTER in the kernel configuration), which is needed by dhcp to work correctly? thanks benoit steinmetz.