Re: Its War!

Frank-FL wrote:


"stanley" <ihazwell@xxxxxxxxxxx> wrote in message
news:stanley.36ecjq@xxxxxxxxxxxxxxxxxxxxxxxxxxxx

C.Joseph S. Drayton;950202 Wrote:
Each office has an IP for each of the Ethernet ports. So yes,
they know which port is doing what. Then tying a MAC address to
port is childs play. Once they have that MAC address, even if
you move to another ethernet jack in the building, they would
know that it is your computer. The key is that unless you fake
your MAC address, it can be tied to your computer. And once they
have your MAC address they will always no where you are plugging
in, in the building.
At one point or another, assuming your IT department takes
network security seriously, they have tied your MAC address to
you. If they simply left those jacks in the office available to
anybody with a laptop, their security would be fairly lax. Even
if you can only log into the router for Internet, the mere fact
that you can get to their router would put them at risk since
you could theoretically hijack their router.

Good network security means that IT always knows what computer is
connected to the network.

Thanks for all that information, which I'm sure is all very basic
for you!

I did not know that each Ethernet port has a unique address-- it
seemed like just another jack in the wall like a phone jack. I
guess not! So all my internet usage can be tracked to my office
and hence to me. I'm an independent contractor and bill based on
services not by salary, so they have no reason to track my time
usage, but still, thats interesting that they could track every
visit to the sports pages to me directly if they wanted to!

It would be interesting to know how anyone or anything could assign an
IP address to a hole in the wall.

The whole in the wall ultimately ends up as a device on the router. The
router can be set so that no matter what machine is plugged into that
'hole-in-th-wall', it will be given a static IP of a particular address.

Ultimately, if DHCP is on, then the router has final say as to the IP
that is accessing it. You could set an IP on your machine and if it is
in range AND is not in use, then you could get away with it. If the IP
were in use, then the machine already using it would know that another
machine tried to use the IP and the router would know. The router can
not handle 2 'holes-in-th-wall' using the same IP.
--

Sincerely,
C.Joseph Drayton, Ph.D. AS&T

CSD Computer Services
Web site: http://csdcs.tlerma.com/
E-mail: csdcs@xxxxxxxxxx
.

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