On 7/4/11 10:02 PM, Tom wrote:
We have two G5s in the house, both running 10.5.8. One of them is
connected to the Internet by a DSL modem (I guess you call it), an
ADSL X6 made by Zoom. The telephone line runs into the modem, and the
modem is connected by a wire that runs into the top port on the back
of the G5 (is that an Ethernet port?). This modem has a little antenna
on it that transmits the Internet connection to the second G5 in the
next room, which picks up the wireless signal through a little unit
with an antenna that plugs into one of its USB ports.
That's all fine.
But I installed Final Cut Pro 5 on both of these machines (the same
serial number), and the odd thing is that if the first Mac is running
FCP when the second one also tries to launch it, a message comes up on
the second one that says "Another Mac is already running this program,
so this copy will not launch," or something to that effect.
What I don't get is, how in the heck does the second G5 in the other
room have any idea what apps are running on the first Mac? I thought
the modem was only transmitting the Internet connection, not
information on what applications the Mac it's connected to is running.
How does that second G5 know what apps are running on the first one?
Can anyone enlighten me on what's going on here?
DRM/Copy protection. The most common way programs do this, is to send
out a notice on the LAN when they start, and see if another computer
responds to the request. If it does, they compare serial numbers, and
refuse to run if they have matching serial numbers that only allow one use.
Some listen for broadcast traffic on a specific port, others may use
multicast.
--
Brielle Bruns
The Summit Open Source Development Group
http://www.sosdg.org / http://www.ahbl.org
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