← All Kali Issues
Nmap
Scan extremely slow
P Performance
Medium
🔴 Error Message
Nmap scan taking hours with default settings
📖 What This Means
Large scans with many ports or hosts can be extremely slow without tuning.
🔧 Step-by-Step Fix
- Use timing template: nmap -T4 target
- Limit ports: nmap --top-ports 1000 target
- Disable DNS: nmap -n target
- Increase parallelism: nmap --min-parallelism 100 target