[eCPPT][nmap]Confirm if a remote machine can be used as a zombie

#nmap -O -v -n 192.168.0.1

OR (when you have already known which remote TCP port is open, such as TCP135 in the following example):

#nmap -O -v -n 135 10.50.97.10

Below shows that the aforementioned machine can be a zombie for Nmap's Idle Scan:
IP ID Sequence Generation: Incremental