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Common Configuration Scenarios

This section provides configuration examples for two common security appliance configuration

scenarios:

• Hosting a web server on a DMZ network

• Establishing a site-to-site VPN connection with other business partners or remote offices

Use these scenarios as a guide when you set up your network. Substitute your own network addresses

and apply additional policies as needed.

Scenario 1: DMZ Configuration

A demilitarized zone (DMZ) is a separate network located in the neutral zone between a private

(inside) network and a public (outside) network. This scenario is a sample network topology that is

common to most DMZ implementations that use the security appliance. The web server is on the DMZ

interface, and HTTP clients from both the inside and outside networks are able to access the web

server securely.

In the Figure 2, an HTTP client (10.10.10.10) on the inside network initiates HTTP communications

with the DMZ web server (30.30.30.30). HTTP access to the DMZ web server is provided for all

clients on the Internet; all other communications are denied. The network is configured to use an IP

pool of addresses between 30.30.30.50 and 30.30.30.60. (The IP pool is the range of IP addresses

available to the DMZ interface.)

Figure 2

Network Layout for DMZ Configuration Scenario

HTTP client

Inside

10.10.10.0

10.10.10.10

PIX 515E

Outside

209.165.156.10

DMZ

30.30.30.0

Web server

30.30.30.30

HTTP client

Internet

HTTP client