← All Kali Issues
Nmap

Service detection hanging

P Performance Medium

🔴 Error Message

Service detection taking too long on multiple ports

📖 What This Means

Service detection (-sV) sends probes and waits. Some services respond slowly.

🔧 Step-by-Step Fix

  1. Reduce intensity: nmap -sV --version-intensity 2 target
  2. Set max retries: nmap -sV --max-retries 1 target
  3. Add timeout: nmap -sV --host-timeout 5m target

🔗 More Nmap Issues

Nmap
Host seems down
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Permission denied raw sockets
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NSE script error
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Scan extremely slow
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UDP scan requires root
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Filtered ports
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