Firewall, maybe everyone is still strange, but once you see its Chinese name firewall, I believe everyone is familiar with it. This is a way to ensure network security. Firewalls can be installed in a separate router to filter unwanted packets, or they can be installed on routers and hosts for greater network security. Since Windows XP first integrated the firewall, MS has been continuously improving the firewall in subsequent versions of Windows. In this article, we'll look at Windows Firewall in Windows 7 and show you how to configure Firewall for a multi-action firewall policy. Evolution
WindowsXP
WindowsFirewall a firewall is a simple, junior only to protect the inflow of information, the software is not up to you to intercept any unsolicited inbound connections Kai - it is off by default of. After SP2, it is started by default and can be configured by the administrator through Group Policy. VistaFirewall is built on a new Windows FilteringPlatform (WFP, Windows Filtering Platform) and adds new filtering outreach information through the AdvancedSecurityMMC embedded snap-in. In Windows 7, MS made further fine-tuning of the firewall to make it more usable, especially for mobile computers, and added support for multi-function firewall policies.
Windows7Firewall Profile
same with Vista is that you can configure to Windows7firewall basis by accessing the Control Panel program. Unlike Vista, you can also perform advanced configuration (including configuration of outbound connection filters) by accessing the control panel instead of having to create a blank MMC and join the embedded snap-in. Just click on the advanced configuration option in the left panel.
more network configuration
Vistafirewall allows you to choose is in the public grid or in a private network, but in Windows7 you have three choices - public network, home network, Office network. The latter two options are the refinement of the private network.
If you choose the "home network" option, you will be able to create a "family group." In this environment, "Network Discovery" will start automatically, you will be able to see other computers and devices on the network, and they will also be able to see your computer. Computers belonging to the "family group" can share pictures, music, videos, document libraries, and hardware devices such as printers. If you have folders that you don't want to share in the document library, you can also exclude them.
If you choose the "work network", "network discovery" also will start automatically, but you can not create or join the "family group." If your computer joins a Windows domain (via Control Panel - System and Security - System - Advanced System Configuration - Computer Name tab) and passes DC authentication, the firewall will automatically recognize the network type as the domain environment network.
The "public network" type is when you use mobile broadband network or the appropriate choice for China Unicom public wi-fi networks in airports, hotels, coffee shops, "Network discovery" will be off by default, so that other network The computer in the middle will not discover your share and you will not be able to create or join the "family group".
all network mode, Windows7firewall intercept any connection will not be sent to the whitelist application by default. Windows 7 allows you to configure different network types separately.
multiple roles firewall policy In Vista, even though you have a public network and private network two profiles used, but will only have a role within a specified time. So if your computer happens to connect two different networks at the same time, then you have to be unlucky. The most restrictive configuration file will be used by the user to all connections, which means that you may not be able to do what you want in the local (private) network, because you are operating under the rules on the public network. In Windows 7 (and Server 2008 R2), different configuration files can be used on different network adapters. That is to say, the network connection between the private networks is governed by the private network rules, and the traffic between the public networks applies the public network rules.