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  1. # Data from NPing's TCP MODE
  2. ~$ sudo tcpdump -n -e -vvv "host dstip and port dstport"
  3. tcpdump: listening on ens3, link-type EN10MB (Ethernet), capture size 262144 bytes
  4. 18:33:21.378407 fa:16:3e:a9:3d:34 > fa:16:3e:b3:d6:24, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 64, id 56437, offset 0, flags [none], proto TCP (6), length 40)
  5. 172.16.1.6.17964 > dstip.dstport: Flags [S], cksum 0x95da (correct), seq 2442293308, win 1480, length 0
  6. 18:33:21.381521 fa:16:3e:b3:d6:24 > fa:16:3e:a9:3d:34, ethertype IPv4 (0x0800), length 58: (tos 0x0, ttl 122, id 20359, offset 0, flags [DF], proto TCP (6), length 44)
  7. dstip.dstport > 172.16.1.6.17964: Flags [S.], cksum 0xed70 (correct), seq 1354835383, ack 2442293309, win 8192, options [mss 1440], length 0
  8. 18:33:21.381560 fa:16:3e:a9:3d:34 > fa:16:3e:b3:d6:24, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 64, id 57160, offset 0, flags [DF], proto TCP (6), length 40)
  9. 172.16.1.6.17964 > dstip.dstport: Flags [R], cksum 0x9b9f (correct), seq 2442293309, win 0, length 0
  10.  
  11. 18:33:22.379007 fa:16:3e:a9:3d:34 > fa:16:3e:b3:d6:24, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 64, id 56437, offset 0, flags [none], proto TCP (6), length 40)
  12. 172.16.1.6.17964 > dstip.dstport: Flags [S], cksum 0x95da (correct), seq 2442293308, win 1480, length 0
  13. 18:33:22.382069 fa:16:3e:b3:d6:24 > fa:16:3e:a9:3d:34, ethertype IPv4 (0x0800), length 58: (tos 0x0, ttl 122, id 20500, offset 0, flags [DF], proto TCP (6), length 44)
  14. dstip.dstport > 172.16.1.6.17964: Flags [S.], cksum 0xcb40 (correct), seq 1355106275, ack 2442293309, win 8192, options [mss 1440], length 0
  15. 18:33:22.382112 fa:16:3e:a9:3d:34 > fa:16:3e:b3:d6:24, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 64, id 57359, offset 0, flags [DF], proto TCP (6), length 40)
  16. 172.16.1.6.17964 > dstip.dstport: Flags [R], cksum 0x9b9f (correct), seq 2442293309, win 0, length 0
  17.  
  18. 18:33:23.380979 fa:16:3e:a9:3d:34 > fa:16:3e:b3:d6:24, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 64, id 56437, offset 0, flags [none], proto TCP (6), length 40)
  19. 172.16.1.6.17964 > dstip.dstport: Flags [S], cksum 0x95da (correct), seq 2442293308, win 1480, length 0
  20. 18:33:23.385960 fa:16:3e:b3:d6:24 > fa:16:3e:a9:3d:34, ethertype IPv4 (0x0800), length 58: (tos 0x0, ttl 122, id 20647, offset 0, flags [DF], proto TCP (6), length 44)
  21. dstip.dstport > 172.16.1.6.17964: Flags [S.], cksum 0xa444 (correct), seq 1355378395, ack 2442293309, win 8192, options [mss 1440], length 0
  22. 18:33:23.386002 fa:16:3e:a9:3d:34 > fa:16:3e:b3:d6:24, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 64, id 57411, offset 0, flags [DF], proto TCP (6), length 40)
  23. 172.16.1.6.17964 > dstip.dstport: Flags [R], cksum 0x9b9f (correct), seq 2442293309, win 0, length 0
  24.  
  25. 18:33:24.382972 fa:16:3e:a9:3d:34 > fa:16:3e:b3:d6:24, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 64, id 56437, offset 0, flags [none], proto TCP (6), length 40)
  26. 172.16.1.6.17964 > dstip.dstport: Flags [S], cksum 0x95da (correct), seq 2442293308, win 1480, length 0
  27. 18:33:24.386016 fa:16:3e:b3:d6:24 > fa:16:3e:a9:3d:34, ethertype IPv4 (0x0800), length 58: (tos 0x0, ttl 122, id 20791, offset 0, flags [DF], proto TCP (6), length 44)
  28. dstip.dstport > 172.16.1.6.17964: Flags [S.], cksum 0x91e5 (correct), seq 1355645238, ack 2442293309, win 8192, options [mss 1440], length 0
  29. 18:33:24.386084 fa:16:3e:a9:3d:34 > fa:16:3e:b3:d6:24, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 64, id 57592, offset 0, flags [DF], proto TCP (6), length 40)
  30. 172.16.1.6.17964 > dstip.dstport: Flags [R], cksum 0x9b9f (correct), seq 2442293309, win 0, length 0
  31.  
  32. 18:33:25.384955 fa:16:3e:a9:3d:34 > fa:16:3e:b3:d6:24, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 64, id 56437, offset 0, flags [none], proto TCP (6), length 40)
  33. 172.16.1.6.17964 > dstip.dstport: Flags [S], cksum 0x95da (correct), seq 2442293308, win 1480, length 0
  34. 18:33:25.388165 fa:16:3e:b3:d6:24 > fa:16:3e:a9:3d:34, ethertype IPv4 (0x0800), length 58: (tos 0x0, ttl 122, id 20938, offset 0, flags [DF], proto TCP (6), length 44)
  35. dstip.dstport > 172.16.1.6.17964: Flags [S.], cksum 0x7ce0 (correct), seq 1355912759, ack 2442293309, win 8192, options [mss 1440], length 0
  36. 18:33:25.388193 fa:16:3e:a9:3d:34 > fa:16:3e:b3:d6:24, ethertype IPv4 (0x0800), length 54: (tos 0x0, ttl 64, id 57644, offset 0, flags [DF], proto TCP (6), length 40)
  37. 172.16.1.6.17964 > dstip.dstport: Flags [R], cksum 0x9b9f (correct), seq 2442293309, win 0, length 0
  38. ^C
  39. 15 packets captured
  40. 15 packets received by filter
  41. 0 packets dropped by kernel
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