ahnmap

Useful nmap commands:

(Replace 192.168.25.0/24 with IP/netmask of subnet to scan)

Info (open ports, OS, etc) about all ports on a subnet
   sudo nmap 192.168.25.0/24 -sS -O
   sudo nmap 192.168.25.0/24 -A -T4            # slower, more info

Just look for open ssh ports (22) or web servers (80 or 443)
   nmap 192.168.25.0/24 -p 22 --open -sV

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