Cannot nmap a free machine

Hello! I have just signed up and I am trying to hack into oopsie. I have openvpn set up and running. I can do ifconfig tun0 to verify that. When i type nmap -sV -A -oN oopsie.txt it says "Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn

Nmap done: 1 IP address (0 hosts up) scanned in 3.54 seconds"

I am not quite sure what this exactly means and what I am to do, to fix it.

Thanks for any help!

Welcome to HTB!

There are some machines that will not respond to ICMP requests, which is a ping. When you run nmap, it will first attempt to ping the host before running its scan. If the host doesn’t respond, nmap will throw that error and stop.

Append -Pn to your nmap command and it should work :slight_smile:

-Pn: Treat all hosts as online -- skip host discovery