5-20
Cisco ASA 5500 Series Configuration Guide using ASDM
OL-20339-01
Chapter 5 Configuring the Transparent or Routed Firewall
Firewall Mode Examples
How Data Moves Through the Transparent Firewall
Figure 5-7 shows a typical transparent firewall implementation with an inside network that contains a
public web server. The adaptive security appliance has an access list so that the inside users can access
Internet resources. Another access list lets the outside users access only the web server on the inside
network.
Figure 5-7 Typical Transparent Firewall Data Path
This section describes how data moves through the adaptive security appliance and includes the
following topics:
• An Inside User Visits a Web Server, page 5-21
• An Inside User Visits a Web Server Using NAT, page 5-22
• An Outside User Visits a Web Server on the Inside Network, page 5-23
• An Outside User Attempts to Access an Inside Host, page 5-24
www.example.com
209.165.201.2
Management IP
209.165.201.6
209.165.200.230
Web Server
209.165.200.225
Host
209.165.201.3
Internet
92412
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