From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jee J.Z." Subject: network setup help Date: Sat, 10 Apr 2004 19:54:47 +0100 Sender: netfilter-admin@lists.netfilter.org Message-ID: <008301c41f2d$4be932e0$68892090@grouse> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: 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" To: netfilter@lists.netfilter.org Dear all, I am trying to setup three PCs and do some simple filter+nat jobs. I'm a green hand on netfilter and linux and seem to always get something wrong. I apologize that my current problem has not reached the range of netfilter; instead, it's about network configuration. But I believe people on this list are very experienced on it. The situation is specified below: 1.PC1 has one NIC with a global IP connected to a Switch; 2.PC2 has two NICs, eth0 with a global IP connected to the Switch and eth1 with an internal IP (192.168.0.1/24) directly connected to PC3's eth1; 3.PC3 has two NICs, eth0 with a global IP connected to the Switch and eth1 with an internal IP (192.168.0.2/24) directly connected to PC2's eth1. Internet | +--------+----+ +------+<-->+PC2/eth0|eth1+ +--------+ + + +--------+--+-+ +PC1/eth0+<-->+Switch+ | +--------+ + + +--------+--+-+ +------+<-->+PC3/eth0|eth1+ +--------+----+ I am trying to send packets from PC1 to PC3, via PC1/eth0(global IP)-->PC2/eth0(global IP)-->PC2/eth1(192.168.0.1)-->PC3/eth1(192.168.0.2). Actually, PC3/eth0 is not in used in the case. Problems: Currently I fail to ping from PC3 to PC2/eth1(192.168.0.1). Actually I don't know which NIC PC3 is using to send the ping packets. I try disconnecting PC3/eth0, but it still does not work. Could anyone throw some light on it and warn me what I should pay attention to? Many many thanks! Regards, Jee