From mboxrd@z Thu Jan 1 00:00:00 1970 From: Philip Craig Subject: Re: Match packet mark with --set-mark to ip rule fwmark Date: Wed, 07 Jan 2004 16:17:13 +1000 Sender: netfilter-admin@lists.netfilter.org Message-ID: <3FFBA469.9080205@snapgear.com> References: <3FFB927B.4010208@snapgear.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: 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"; format="flowed" To: kaiwen Cc: netfilter@lists.netfilter.org kaiwen wrote: > (2)[root@g root]# ip ro show table test2 > prohibit 192.168.8.88 > prohibit 192.168.250.197 > > (3) [root@g root]# iptables -t mangle -L > Chain OUTPUT (policy ACCEPT) > target prot opt source destination > MARK all -- anywhere anywhere MARK set 0x5 But you changed both the IP address for the prohibit *and* the chain the mark is in. So you still won't get packets that match both. Just change one or the other. That is, if you want to drop an incoming ping packet, then the prohibit must specify a local IP, and the mark rule must be in the PREROUTING chain. If you want to drop an outgoing ping packet, then the prohibit must specify a remote IP, and the mark rule must be in the OUTPUT chain. You could also just always put the mark rule in both PREROUTING and OUTPUT. Here's another option: change the mark rule so that it specifies the source or destination, and also change the prohibit to be 'prohibit any'. > Take a look at ip rule, the first rule route all packet to table local, > which has a route for 192.168.8.0/24. Is it true that once there is one rule > which match for the packet, it will route according to it. If so, I remove > the route from table local and put it at table test2, which is > Configurations B. Yes, it will use the first route that matches. Note that moving the route to table test2 will break routing for packets that don't use table test2. You probably want to move it to table main. -- Philip Craig - SnapGear, A CyberGuard Company - http://www.SnapGear.com