Tcpdump

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tcpdump

tcpdump -i <network_interface> -s 0 -w <file>

Capture packets to host [1]

tcpdump -i any -s 0 -w <file> host 10.1.1.1
tcpdump -i <network_interface> -s 0 -w <file> host 10.1.1.1

Capture packets and specify both IP and port [2]

tcpdump -i enp1s9 dst 192.168.6.1 and src 192.168.6.2 and src port 80

ipv6

tcpdump -t -n -i eth0 -s 512 -vv ip6 or proto ipv6

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