Windows Firewall is a program built-in Windows to protect the computer from hackers.
Internet Connection Firewall
Windows Firewall first appeared in Windows XP as Internet Connection Firewall. The problem of the first version (in RTM & SP1) was that the only thing you can do is to turn it on or off.
The second version of firewall renamed the firewall line as Windows Firewall. This version was improved from the first version by letting you do more configurations in a separate applet. This version appeared in SP2.
Current Version (3.0)
The third version improved it by adding even more capabilities. It is included in Windows Vista.
- It can allow exceptions
- You can make Firewall disable exceptions