Firewalls - Dell Inspiron 545 MT User Manual

Using Antivirus Programs
Protect your computer from viruses by using antivirus programs. Two popular
antivirus programs include Norton AntiVirus and McAfee VirusScan. Both of
these programs will regularly check your computer for viruses and quarantine
suspected programs and data.
You can obtain antivirus programs from the Dell Support web page located at
support.dell.com.
Updating Your Antivirus Programs
Keep your antivirus program up to date since new viruses are discovered every
day. Regularly check for updates to your antivirus program. Some antivirus
programs can update automatically when you are connected to the Internet.

Firewalls

Firewalls are an added security feature in Windows operating systems. A
firewall is a software device that is configured to allow data to pass through a
computer network, which has different levels of trust.
The basic task of a firewall is to regulate the flow of traffic between computer
networks of different trust levels.
EXAMPLE:
• Internet, which is a zone with no trust
• Internal networks, which are zones of higher trust type
To set up a firewall:
1 Click Start→ Control Panel→ Network and Internet Connections→
Windows Firewall.
OR
Click Start→ Control Panel→ Security Center→ Windows Firewall.
2 Click Change Settings. Windows Firewall Settings window appears.
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Accessing the Internet
Typical examples of computer networks are: