Can we use open wrt as proxy to debbuging https request kinda like burp suite tool in windows,I'm not quite sure as i saw total space in my router (hg553) is only 9mb and log file can take huge size
So basically wireless AP from openwrt will log any internet connection from wireless client
Try cloudshark, evaluation license works for 30 days, and you log to a cloud service, no local storage required, except for the package.
Once tcpdump is installed in the router, you can run it remotely. From another linux with wireshark run:
ssh email@example.com tcpdump -i eth1 -U -s0 -w - 'not port 22' | sudo wireshark -k -i -