Cisco 6500 - Catalyst Series 10 Gigabit EN Interface Module Expansion, Configuration Manual, Page: 118 / 742

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Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM
OL-20748-01
Chapter 5 Configuring the Firewall Mode
Transparent Mode Overview
How Data Moves Through the Transparent Firewall
Figure 5-8 shows a typical transparent firewall implementation with an inside network that contains a
public web server. The FWSM 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 5-8 Typical Transparent Firewall Data Path
This section describes how data moves through the FWSM, and includes the following topics:
•
An Inside User Visits a Web Server, page 5-13
•
An Inside User Visits a Web Server Using NAT, page 5-14
•
An Outside User Visits a Web Server on the Inside Network, page 5-15
•
An Outside User Attempts to Access an Inside Host, page 5-16
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
92896
FWSM