Why can I ping a server but an Nmap normal scan cannot see the host

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I'm trying to scan a network using Nmap, but I’ve noticed something strange:

  • When I ping a server, I get a response, indicating it's online.
  • However, when I run an Nmap normal scan, the host appears to be unreachable.

Could this be due to firewall rules, ICMP filtering, or something else? What steps can I take to troubleshoot why ping works but Nmap scan doesn’t?

Feb 7, 2025 in Cyber Security & Ethical Hacking by Anupam
• 18,970 points • 891 views

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