Understanding the Concepts of Security Topologies

Understand the basic security concepts of security topologies.

The concepts of security topologies are based on firewalls and their application to specific network design scenarios. Topologies consist of hardware devices and security zones that are created with these devices. The remainder of this chapter provides an overview of how firewalls are used to segment the network into security zones and create various security topologies. The following security topics are covered in more detail in the following sections:

  • Security zone topologies

  • VLANs

  • NAT

  • Tunneling

Security Zones

The three major types of security topologies are as follows:

  • Bastion host

  • Screened host gateway

  • Screened subnet gateway

Various ...

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