Windows 7 system firewall detailed

        Since the introduction of the first firewall built into the Windows XP system (Internet Connection Firewall), Microsoft has been steadily improving the firewall capabilities of its later systems. The Windows Firewall in the latest client operating system, Windows 7, has been revolutionized to provide more user-friendly features and a significant improvement in the firewall for mobile users. In this article, we'll cover Windows Firewall in Windows 7 and how to configure it with multiple firewall policies.

History of Windows Firewall

The firewall software in Windows XP only provides simple and basic functions, and can only protect inbound traffic and prevent any inbound connections that are not started locally. By default, this firewall is turned off. The SP2 system is enabled by default, allowing system administrators to enable firewall software through Group Policy. Vista's firewall is built on the new Windows Filtering Platform (WFP), which adds the ability to filter outbound traffic through the Advanced Security MMC snap-in. In Windows 7, Microsoft has further tuned the firewall's capabilities to make the firewall more user-friendly, especially on mobile computers, and capable of supporting multiple firewall policies.

Windows 7 Firewall

In Vista, the basic settings of the Windows 7 firewall are set through the control panel program. Unlike Vista, you can also access advanced settings through the control panel (including Configure outbound connection filtering) without creating an empty MMC and adding a snap-in. Just click on the advanced settings link in the left panel.

More Network Options

Vista Firewall allows users to choose public or private networks. In Windows 7, you have three choices: public network, home network or working network, the latter two Both are considered private networks.

If you choose the "Home Network" option, you can create a Homegroup. In this case, network discovery is automatically turned on so that you can see other computers and devices on the network and they can see your computer. Computers belonging to Homegroup can share pictures, music, videos, and document libraries, as well as share hardware devices such as printers. If you have files in your folder that you don't want to share, you can also exclude them.

If you choose "Work Network", network discovery is enabled by default, but you will not be able to create or join Homegroup if you add your computer to the Windows domain (via Control Panel