Re: [PATCH] nmap-service-probes: Misc database corrections, printer additions

[David Fifield <david () bamsoftware com>]

On Mon, Jul 13, 2009 at 12:16:43PM -0700, Aaron Leininger wrote:
> > Another thing I just thought of: What happens if you write these
> > commands to port 9100 to a printer that doesn't understand PJL? Will
> > they be printed out on paper?
>
> I tested out some of the PJL commands on a lexmark optera s 2455
> laserjet. The commands behave slightly differently:
>
> *The RDYMSG command does not print on paper but neither does it alter
> the ready message on a lexmarck. 
> *The ID command sent raw through ncat does elicit a response but it
> sets off the printer's busy light. This does not seem to adversley
> affect the ability to print as I was able to send text afterwards
> through the same open ncat socket and it printed out. Also, the return
> data returned "Lexmark Optera S" w/o the exact model # where an HP
> returns the model # as well. 
> *The STATUS command behaves similar to the ID command except that it
> always returns a state of BUSY on a lexmark unless it is asleep in
> which case it returns "Power Save Mode". Even when the display read
> "READY". It always returned BUSY to my probe. 

That's good that it didn't print on any of those printers. I think it's
a good idea for the script to do a preliminary @PJL INFO STATUS, and if
it doesn't get a response back, not to send anything more to the port.

David Fifield

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