I'm a high schooler in a CyberDefense Class and we are learning to PenTest.
I'm on Red Team and my teacher set up a system with Rasbian as the OS. When I run a scan on the computer scanning the Top 20 ports with nmap. It all comes up with filtered, including the Windows ports.
And when I run a scan, doing a
nmap -v -O 172.16.0.89 it ends immediately. I've changed my IP address and MAC address.
So I have two questions here, How could it be that all the top 20 ports are filtered while all being windows ports on a Debian-based OS, and how could he still be blocking my virtual machine?