Re: Need firewall protection,

Some preliminary research will help you understand.

http://computer.howstuffworks.com/router.htm
----- Original Message ----- 
From: "Dan Bale" <dbale@xxxxxxxxxxxxx>
To: "PC Technical Discussion for iSeries Users" <pctech@xxxxxxxxxxxx>
Sent: Thursday, July 29, 2004 9:12 AM
Subject: RE: [PCTECH] Need firewall protection,


> I appreciate all of the responses!
>
> The main thrust I am picking up about the hardware firewall is that
> uninvited "guests" are effectively turned away.  I imagine this is true
> because my PC has an IP address given by the router, a 192.168.n.n, which
is
> "untouchable" from the outside.  Meanwhile, the router, having the address
> given by my ISP, *somehow* knows which traffic coming in is legit, and
which
> is not.
>
> It is that last part I'm unclear on.  Also fuzzy is the part where I have
> more than one PC communicating on the internet simultaneously through this
> router; how does the router know which PC to route the legit traffic to?
>
> The other thing that I'm learning here is that the firewall/router only
> protects against incoming baddies, and does nothing to stop baddies that
> somehow make it onto my PC and "phone home".  I mentioned my paranoia
> yesterday about keyloggers.  David, I guess I'm surprised that you don't
run
> a software firewall as well.  What protection do you have against the
"phone
> home" baddies?
>
> db
>
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