find printers with nmap

usages

1. use nmap

    $ nmap -p 515,631,9100 -oG - 192.168.200.1/24
    Host: 192.168.200.131 ()	Status: Up
    Host: 192.168.200.131 ()	Ports: 515/open/tcp//printer///, 631/closed/tcp//ipp///, 9100/open/tcp//jetdirect///
   

2. references

   1. https://serverfault.com/questions/154650/find-printers-with-nmap