ppp

Hi all: I'm posting in this forum because I never ever use WiFi, and the problem is related to PPPoE over DSL. If this post belongs somewhere else, please feel free to move it with my apologies. While I'm reasonably technical in terms of general computing, my networking knowledge is limited...

I have an ASUS RT AC-66U Wi-Fi router with stock firmware which works in router mode with ppp connection to ISP. Recently when I was trying to capture network traffics on the router with tcpdump, I realized that most outbound traffic can only be captured on eth0 and most inbound traffic can...