tcpdump を使いこなそう
tcpdump atmarkit


# tcpdump -ni eth0 host 192.168.0.1 

  (i specifies interfece, n is numeric output)

# tcpdump host [IP] -nnxX -s0 -l | tee /tmp/tcpdump.cap

# tcpdump -i eth1 -s0 -n -w /tmp/tcpdump.cap

  (-w is useful to read Wireshark(http://www.wireshark.org/))





# iptables -F [chain]    (Delete/Flush all rules in chain)

# iptables -L [chain] -n    (List the chain with numeric output)



# arping -I eth0 192.168.0.1    (which Ethernet device to use)



# time echo quite | telnet 192.168.0.1 8080