How to capture the packet outside the NAT Router

1. We can plug hub connected to the WAN port of NAT Router. And then use NB connected to the hub. Then we can capture packets onto the NB by using capture software (e.g. wireshark).

2. We can plug switch connected to the WAN port of NAT Router.The switch comes with a Port Mirror feature. So we can connect a PC to the mirror port to capture all the packets pass through the switch.