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“To print the start and end packets (the SYN and FIN pack ets) of each TCP conversation that involves a non-local host. tcpdump 'tcp [tcpflags] & (tcp-syn | tcp-fin) dst net localnet' To print IP packets longer than 576 bytes sent through gateway snup: tcpdump 'gateway snup and ip [2: 2] > 576' To print IP broadcast or multicast packets that were not sent via ethernet broadcast or multicast: tcpdump ip  > = 224 'To print all ICMP packets that are not echo requests / replies (i.e., not ping packets): tcpdump' icmp [icmptype]!”
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