Bridging interfaces and capturing traffic
I am working on something here at home and I basically want to capture packets between my cable modem and wireless router. I have a dual nic'd pc running linux and I'd like to be able to bridge my interfaces and dump the traffic (preferably tcpdump) into a pcap file that I can view later.
I want the MITM (Machine in the Middle) to be as transparent as I can get it, so I thought iptables would come in to play.
Anyone have experience setting something like this up?