7. Packet Forwarding
This chapter covers some of the basic issues underlying LAN security, the forwarding of gateway firewalls, and perimeter networks. Security policies are defined relative to the site’s level of security needs, the importance or value of the data being protected, and the cost of lost data or privacy. This chapter opens by reviewing the firewalls presented in earlier chapters and then discusses issues that the site’s policy maker must address when choosing server placement and determining security policies.
You may need Network Address Translation (NAT) to access the Internet from internal machines. NAT is not discussed until Chapter 8, “NAT—Network Address Translation.” This chapter focuses on forwarding alone.
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