Tom, I think you are wrong about most people not using CUPS
for printing, (at least on OS X, which is what I think you are talking
about). I'm pretty sure that CUPS is the system that the printing
GUI interacts with.
A neat trick that I recently re-discovered backs this up.
In OS X, if you point your browser to <http://127.0.0.1:631/printers>,
you'll get taken to a web interface to your machine's CUPS printers.
If you try it, you'll see all your real printers and any non-system
virtual
printers (like Adobe's PDF engine) that you have installed. That page
will let you do some things with your printers that you might not be
able to do in Print Center.
Apple licensed, then purchased CUPS for a reason. Printing was a
mess in 10.0 and 10.1, but with the addition of CUPS in 10.2, OS X
users became able to use every printer that Unix/Linux users could.
From: Tom Piwowar <t...@tjpa.com>
So which of these listeners identified on Alvin's computer are
untrustworthy?
Well he is running a Unix so he is probably better off than someone
running notorious Windows. Nevertheless, listening to a port that
supports a function you do not need has no benefit and a (probably
small)
potential risk. The CUPS (Common Unix Printing System) is only
useful if
he is using CUPS printing. Most people don't. The Netadmin port I
don't
know about. I know my Mac is not listening to that port.
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