SECTION 2
Lesson 2.2: Internet And Networking Tools

   

 

 

A firewall can be a combination of hardware and/or software which prevents un-authorized access to your computer. This helps to keep you computer more secure by restricting information (like worms or viruses) that comes to your computer without invitation. In Windows XP Service Pack 2, the Windows firewall is turned on by default. (Prior to Service Pack 2 the Windows Firewall was called the Internet connection firewall.)

 

  

There are three tabs available in the Windows Firewall window. Let us discuss these tabs a bit further.



 

General tab

 

On: Turns on the Windows Firewall and blocks all outside sources from connecting to the computer, with the exception of those under the Exceptions tab.

 

Don’t Allow Exceptions: A checkbox option which keeps the firewall on but does not allow exceptions through.

 

Off: Turns the Windows Firewall off. Used when another 3rd party firewall is installed or for troubleshooting purposes.

Exceptions tab

Tells Windows to allow exceptions through the firewall. You may add entries by programs or ports. You may also edit existing entries or delete them. You also have a checkbox option at the bottom to display a notification when Windows Firewall blocks a program.

Advanced tab

 

Network Connection Settings: Allows you to specify which connection the Windows Firewall is applied to. Click the Settings button for the individual settings for each connection.

 

Security Logging: Creates a log file for troubleshooting the Windows firewall. Click the Settings button for additional security logging options.

 

ICMP (Internet Control Management Protocol): This feature is used on an internal network to share error and status information with other computers. Click the Settings button for more advanced options.

 

Default Settings: Allows you to restore the Windows firewall to its default settings.