Is it possible to playback and receive UDP packets on different NICs (network interface cards) that were used to transmit and receive the original packets? I tried to use Colasoft Packet Player with no success. Explanation: I try to capture packets sent from computer A to computer B on my LAN. I want this file to be played on a different LAN (i.e. computer A' tansmits the packets to computer B'). I beleive that it does not work because the MAC addresses of the computers are not identical.