[unisog] HP JetDirect guessing game
michael.holstein at csuohio.edu
Fri Mar 13 17:42:49 GMT 2009
As a corollary to Murphy's law, it seems that "No device will fail to
malfunction in the presence of a technician".
Such is my current dilemma .. we have a few hundred HP JetDirect devices
scattered around campus, all of which are attached to print servers of
some sort (but are otherwise un-firewalled, meaning one could print
directly by configuring IP printing of some flavor).
What we're getting is otherwise blank pages, containing only the date
(MM/DD/YYYY) in the top-left corner.
This can be replicated by doing (from *nix) .. "date +%m/%d/%Y |nc
Being as HP's built-in tools have no page log that contains useful info
like which IP a job came from, I resorted to the brute-force "hub and a
laptop" approach .. upon which the problem promptly stopped .. all
I've checked a bunch of other points in the network (firewalled devices,
linux boxes, etc.) to see if there's any sort of scan that's hitting
everything (Nessus, for example, will do this if "safe checks" is
disabled .. but it spews tons of junk) and I don't see any evidence of it.
So my question to you fine folks is this .. "is there any tool
(network/security/scan/etc) you're aware of that causes a printer to
emit a otherwise blank page containing only the date?".
Cleveland State University
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