Error was simple logic: if (ethdr != NULL) Should have been if (ethdr == NULL) I could not see the forest through the trees. Cheers -----Original Message----- From: Jan Engelhardt [mailto:jengelh@xxxxxxxxxx] Sent: Thursday, April 08, 2010 8:50 AM To: Robert SZABO Cc: netfilter-devel@xxxxxxxxxxxxxxx Subject: Re: NF_IP_POST ROUTING - Send packet back out on same interface it came in on On Thursday 2010-04-08 14:15, Robert SZABO wrote: > >> Subject: NF_IP_POST ROUTING - Send packet back out on same interface it came in on > >Problem solved. Thanks for all your input! You cannot just send "to (ethernet) interfaces", because the hardware would not know where to send it to once the packet *is* in the interface. Don'tcha think? You need a target for those, like MAC address. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html