← All Kali Issues
Nmap
Filtered ports
S Scanning
Medium
🔴 Error Message
Ports show as filtered behind firewall
📖 What This Means
Firewall is dropping scan probes silently.
🔧 Step-by-Step Fix
- Fragment packets: nmap -f target
- Use decoys: nmap -D RND:10 target
- Spoof source port: nmap --source-port 53 target
- Try ACK scan: nmap -sA target