playing with nmap at layer 3 (inet)

handy variable

cidr=192.168.0.0/24

ping scan

nmap -sn $cidr

intent to find more than just ICMP

    nmap -Pn -sS -p0 $cidr
    nmap -Pn -sU -p0 $cidr

guess OS

    -O --osscan-guess
    -A

handle timeouts faster on a LAN and even more on a cluster

    -T4
    -T5