Security device/technology placement

It is important for a security or network administrator to understand the functionality that each device provides and where best to place them to ensure that your network is safe. Figure 20 shows the placement of each device:

Figure 20: Security device placement

If we look at Figure 20, the first thing you will notice is that the three network zones that have been established are the LAN, DMZ, and WAN. These networks are divided by two firewalls that are in a back-to-back configuration so that if traffic manages to get through the first firewall, we hope that the next firewall stops it. As resources, such ...

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