2 Feb
2002
2 Feb
'02
5:20 p.m.
On Sat, 2 Feb 2002, Jeffrey S. Sharp wrote:
On Sat, 2 Feb 2002, Tothwolf wrote:
Well, I wouldn't want to go that far, as it would likely electrocute
anyone who happened to touch the other end of the cable plugged into the
jack. 48VDC across some TX/RX pins would still certainly take the NIC for
a thrill ride, and it would likely loose its magic smoke in the process.
I'd think that would be enough of an incentive for all but the most
determined intruder to not try it again.
For some ultra-secure type site, wiring the other
two pairs to detect a
connection, and or to deliver 48VDC (from a spare telephone switch
supply) would deter all but the most determined.
Or even have it so that unused RJ45 wall jacks are wired to a nearby
electric outlet. "Oh, you plugged into one of our proprietary power
ports...". Or use (or invent, if they do not exist) wall jack
panels that have a
lockable metal door.
Locking covers are available for Leviton "Decra style" receptacles, and
there are "Decra style" keystone plates available. There are several
problems in implementing this idea however. Those locking covers are both
ugly, and expensive, and it is also quite likely they would end up being
left unlocked anyway.
IMHO, the best way to avoid this kind of problem is to not install RJ45
jacks in insecure areas in the first place. The next best way to avoid
this kind of problem is to disconnect the jack completely, or at the very
least, restrict what can be done via a connection to the jack.
-Toth