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Dan Bale wrote:
I am going to ask one more question relating to this. Couldn't a router be
fooled, "spoofed" if you will, by an "uninvited" guest on the outside
sending something to the router so that it believes it is a result of
something initiated on my PC?
Nope ... routers have to network interfaces ... one for the outside, one
for the inside. Anything coming in from the outside goes nowhere.
Stuff from the inside is routed through to the outside interface.
How does the router/firewall
assure that the information it receives is coming from a source that the PC
initiated?
MAC address ... each network interface has one. It's unique (more or
less).
If someone REALLY REALLY REALLY wanted to send a virus to you I guess it
is theoretically possible for them to be a 'man in the middle' and spoof
the remote IP & MAC address. But I don't think it's very practical.
'course if the information is really important, it would no doubt be SSL
encrypted ... so not only would they have to know where you are coming
from, where you are going to, get between the two, then decrypt the SSL
traffic.
As I've said ... there are far easier ways to steal information from
you... like simply breaking into your house :)
david
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