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Securing Your Business with Cisco ASA and PIX Firewalls by Greg Abelar

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Basic Network Topology

This chapter provides a common and basic network topology as an example for the ASDM Startup Wizard procedure. The topology is such a standard template that, unless you have a unusual circumstance, you can follow these steps verbatim and have secure Internet connectivity upon completion.

Figure 5-1 shows the topology you will use for your ASDM Startup Wizard procedure.

Figure 5-1. Basic Network to Internet Topology

It's important to understand the basic elements and terminology used in this topology:

  • Internet

  • Service provider

  • Default gateway

  • IP address and subnet masks

  • Inside address

  • Inside network

  • Internet server addresses

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