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Explore how failed scans appear in Wireshark, including dropped probes, no-responses, and rejected packets. You'll learn how to distinguish between accidental misfires and intentional blocked scans, and what response patterns reveal about target systems.

Key topics:

  • TCP resets and ICMP unreachable messages

  • SYN-only or half-open attempts

  • Firewall interference and filtering indicators

  • Identifying tool behavior (e.g., Nmap stealth scan signatures)