19.03.2014, 06:18, "fsluck" <linuxl...@163.com>:
> how to tell tcpdump only to capture packets that go throught iptables
iptables can send packets to NetFilter loggger (-j NFLOG --nflog-group 20) on
which tcpdump can capture (-i nflog:20)
> i want to calculate how many icmp packets are received after i setup several
> iptables rules for icmp.
Mere counting is possible even without tcpdump: each iptables rule has counters
for bytes and packets (iptables -vnL INPUT).
--
Denis Ovsienko
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