Hi, Don't blame me if this question is too simple. I am new to Linux kernel. I am dealing with the Netfilter PreRouting hook. I want to write current IP address into the packet. But I can not find a way to get the IP address of the incoming device. Any suggestion is appreciated. Jiangbo - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html