Some simulators implement a "stealth" mechanic. If you have been detected by a firewall or your "noise level" is too high, your Nmap scan will be blocked automatically.
: By default, Nmap only scans the top 1,000 most common ports. If the vulnerability is on a non-standard port, use -p- to scan all 65,535 possible ports. hacker simulator nmap not working work
Some simulators require specific flags to work. Try nmap -v [IP] or nmap -p 80 [IP] instead of just the IP address. Some simulators implement a "stealth" mechanic
: Forgetting the target IP or using incorrect flags (like -p- for all ports) can lead to command errors. Nmap only scans the top 1
"That's… not very hacker-y," he said.
sudo nmap -sF -Pn target_ip