Hi, Is there an exact and complete diagram of a packet journey inside netfilter? I have found something strange that may require some explanation: I am running Linux 2.6.11 on a device with two network interfaces. When I generate locally (local process) a packet (UDP for instance) with a source address of one interface and a destination address of the other, the packet go through PREROUTING chain in the mangle table but not in the nat table. Is there a reason behind this behaviour? Thank you. Pierre-Marie Wecowski Software Designer Mediatrix Telecom