Building Internet Firewalls
by D. Brent Chapman and Elizabeth D. Zwicky


Here are the change that were made in the 9/98 reprint:


{187} reprinted to correct obscured Figure 6-13.  The figure should resemble 
Figure 6-12, with these differences:

	- the "Attacker" box should read "TCP 25"
	- the lines should be labelled 7 and 8