Is it possible to sniff (with tcpdump) or mirror LAN traffic that doesn't get routed to WAN using openWRT?  Say  I have two PCs connected to LAN ports and I want to sniff on traffic one PC is sending to the other one? --tee feature is of no use in this case as nothing gets routed and therefore iptables cannot pick it.I have read somewhere that such thing might be possible by implementing VLANs but frankly I don't understand how. I have openWRT firmware on DIR-300 and Linksys E1200.
Sniff on SWITCH(lan) traffic openWRT
iptables;routing;openwrt