With the popularity and rapid development of Internet applications, network security has become a problem that people are worried about. Viruses and hacker attacks are the main hidden dangers of network security, and they are always threatening the security of computer systems for Internet applications. As the main means to prevent hackers, network firewalls have become a must-have device for network security construction. Do you know about it? Especially the firewall under the new system Win7, how much do you know? Even if you don't understand, it does not matter, today Xiaobian to learn in this section can be friends. history of
Windows firewall
WindowsXP firewall software provide only simple and basic functions, and can only protect the Station traffic, blocking any inbound connections that are not natively started. By default, the 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.
Windows7 firewall in Vista, Windows7 basic firewall settings through the Control Panel program is set, and Vista is different, you can also access advanced settings through the control panel (including the configuration Station 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 the user to select the public network or private network, while in Windows7, you have three choices: both the public network, home network or work network, after all It is considered a private network.
If you select "Home Network" option, you can create a Homegroup. In this case, network discovery (networkdiscovery) 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 can not create or join Homegroup, if you join the computer to a Windows domain (via ControlPanelSystemAdvancedSystemSettingsComputerNametab) and by domain controllers Verify that the firewall will automatically treat the network as a domain network.
when you connect at the airport, hotel or coffee shop and other locations to a public wireless network or use a mobile broadband network, should choose "Public Network", Network Discovery will be off by default, so the network of other computers You can't see your computer, you can't play Sichuan opera or belong to Homegroup.
For all network types, by default, Windows7 firewall will block the connection of the program is not permissible on the list of programs, Windows7 allows you to configure settings for each network type separately.
more effective mode In Vista, even though you have configured the profile for the public and private networks, only one is active at a given time. If your computer is connected to two different networks at the same time, then things are not good, then all the connections will be used in the strictest mode, which means you may not be able to do all the required operations on the local network because The rules for the public network mode are used at this time. In Windows 7 (and Server 2008 R2), different modes can be used for each network adapter at the same time, private network rules are used for connections to private networks, and public network rules are used for traffic from public networks.