Securing Your Business with Cisco ASA and PIX Firewalls

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