Objective 4.4: Identify and Troubleshoot Network Connectivity Problems Caused by the Firewall Configuration


A firewall acts as a security system that creates a border between a computer and the Internet, or between a local network and the Internet. The firewall blocks all incoming traffic from the Internet, except those types of traffic that you explicitly allow. Firewalls help keep malicious attacks from infiltrating the computer and network.

Windows XP comes with a software-based firewall named ICF built in. Any computer connected directly to the Internet, whether it is a standalone computer or a computer that provides ICS services for other computers on a network, should have the ICF enabled.

As a DST, you should understand how to enable ICF for a network or dial-up connection. You should understand what kinds of traffic you can configure ICF to allow and how to do so. You should know how to enable security logging for ICF, how to locate the log file, and what kinds of information the log file contains. You should also know the purpose of the Internet Control Message Protocol (ICMP) and how to configure ICF to allow particular ICMP messages to pass through the firewall.




McDst Self-Paced Training Kit (Exam 70-272(c) Supporting Users and Troubleshooting Desktop Applications on a[... ]ystem)
McDst Self-Paced Training Kit (Exam 70-272(c) Supporting Users and Troubleshooting Desktop Applications on a[... ]ystem)
ISBN: N/A
EAN: N/A
Year: 2006
Pages: 237

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