in icmp 1.1.1.1 2.1.1.1 echo
in icmp 1.1.1.1 2.1.1.1 echo,1
in icmp 1.1.1.1 2.1.1.1 echo,3
in icmp 1.1.1.1 2.1.1.1 unreach
in icmp 1.1.1.1 2.1.1.1 unreach,1
in icmp 1.1.1.1 2.1.1.1 unreach,3
in icmp 1.1.1.1 2.1.1.1 echorep
in icmp 1.1.1.1 2.1.1.1 echorep,1
in icmp 1.1.1.1 2.1.1.1 echorep,3
in icmp 2.2.2.2 3.3.3.3 maskreq
out icmp 3.3.3.3 2.2.2.2 maskrep
in icmp 4.4.4.4 5.5.5.5 timest
out icmp 5.5.5.5 4.4.4.4 timestrep
in icmp 6.6.6.6 7.7.7.7 inforeq
out icmp 7.7.7.7 6.6.6.6 inforep