Hi, I am doing an experiment with iptables. I use a hub to connect two computers. Computer A captures the video packet (or any packets) and computer B runs iptables and my code in Red Hat 8. Basically, with hub, computer B will be able to see the packets coming to computer A. I would like computer B to preroute this packet and put these packets in userspace where I run my code. I uses : ** Iptables -t mangle -I PREROUTING -p udp -I eth0 -j QUEUE However, seems like I only be able to capture broadcast packets. (But TCPDUMP could see the udp packets). I have checked my code (just a simple code that scan what kind of packets and it worked with udp generator such as iperf or hping). I have tried a few other similar ways but still only could capture broadcast packets. Does anybody spots my mistake or could give me advice for better solution? Thank you Best regards, Regina Reine
