Lab #3 Scanning - Penetration testing Professional

Hi everyone.

I’m trying to pass the Lab#3 of PTP course, about scanning. I tried to run the idle scan with the follow command:

nmap -Pn -sI -p135 -v

However, I see the follow message:

Idle scan zombie ( port 80 cannot be used because it has not returned any of our probes – perhaps it is down or firewalled.

Obviosuly, port 80 on is open, as I saw in previous task. How can implement the idle scan? I tried to see the solution too, but it don’t involve any host in the network. How is it possible?

Thank you in advice.

I had the same issue. I used the hping3, but I also struggle with the same error when trying to use Nmap