网络抓包工具Tcpdump
查看443端口的发包情况 1 tcpdump -nnSX port 443 结果 1 2 3 4 5 6 7 8 9 10 11 12 18:36:15.567688 IP 192.168.31.26.51842 > 104.21.5.103.443: Flags [P.], seq 3089667269:3089667306, ack 3818071690, win 4096, length 37 0x0000: 8c53 c3c7 8e3d f45c 89a5 12a9 0800 4500 .S...=.\......E. 0x0010: 004d 0000 4000 4006 ed6c c0a8 1f1a 6815 .M..@[email protected]. 0x0020: 0567 ca82 01bb