← All Kali Issues
Nmap
OS detection failed
S Scanning
Low
🔴 Error Message
No matching OS fingerprint found in database
📖 What This Means
TCP/IP fingerprint does not match any known OS.
🔧 Step-by-Step Fix
- Ensure open and closed ports exist
- Use aggressive: nmap -O --osscan-guess target
- Update Nmap for newest fingerprints