[tcpdump-workers] how to tell tcpdump only to capture packets that go throught iptables

how to tell tcpdump only to capture packets that go throught iptables i want to calculate how many icmp packets are received after i setup several iptables rules for icmp. thanks ___ tcpdump-workers mailing list tcpdump-workers@lists.tcpdump.org htt

[tcpdump-workers] the order among tcpdump, iptables, ebtales to process packets

hi,all according to my test, the order to process packets is ebtables, tcpdump,iptables? i want to know why if i am right? how tcpdump capture packets and at which level? thanks ___ tcpdump-workers mailing list tcpdump-workers@lists.tcpdump