Great write up on network printer hacking at IronGeek's site here for anyone interested http://www.irongeek.com/i.php?page=security/networkprinterhacking.
Here's what I want to do: Scan the subnet for HP printers with port 9100 open. I know I can use OS fingerprinting and the port argument to filter it down. I want to export the IP addresses matching this criteria to a file or list, and then telnet to every one of those IPs and issue a command. Specifically: @PJL RDYMSG DISPLAY=”YOUR MESSAGE“. This will cause the printers to display a custom ready message.
Advice? Guidance? How would I go about doing this?