Setting up a network and sharing internet

[Lennart Sorensen]

On Wed, Aug 24, 2005 at 10:06:03AM -0400, Henry Spencer wrote:
> That can be avoided by giving the eavesdropping computer two Ethernets,
> and setting it up to act as a bridge (so it doesn't have its own IP
> addresses etc. to mess up the picture).  It can provide full duplex,
> and at least a cheap imitation :-) of full speed, depending on how well
> it can keep up.  Moreover, not only can it eavesdrop on the packets it's
> relaying, but it can alter them as well, which is sometimes very useful.

The truly transparent firewall setup relies on this.  A firewall that
sits on the wire between two points and can filter traffic without
either end needing to know about the existence of the firewall.

Lennart Sorensen
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