Parsing the firewall configuration of Windows 7 system

Windows XP integrated firewall is often regarded as a chicken rib, but now the powerful features of WIN7 firewall also have a "professional" taste. Today, I will teach you how to use the WIN7 firewall.

Same as Vista, you can configure the Windows 7 firewall 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.

Vista Firewall allows you to choose whether to be on a public grid or a private network, and in Windows 7, you have three choices - public, home, and office. 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 "Work Network", "Network Discovery" will also start automatically, but you will not be able to create or join the "Family Group". If your computer joins the 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.

And the "public network" type is the appropriate choice when you are in the airport, hotel, cafe or use the mobile broadband network to connect to the public wi-fi network, "network discovery" will be turned off by default, so other networks The computer in the middle will not discover your share and you will not be able to create or join the "family group".

In all network modes, Windows 7 Firewall will block any connection sent to applications that are not whitelisted by default. Windows 7 allows you to configure different network types separately.

Multi-Action Firewall Policy

In Vista, although you have two profiles for public and private networks, only one will work for a specified amount of time. So if your computer happens to connect two different networks at the same time, then you have to be unlucky. The most restrictive profile will be taken by the user to all connections, which means you may not be able to do what you want on the local (private) network because you are operating under the rules on the public network. In Windows 7 (and Server 2008 R2), different profiles 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.

What's the little things that don't stand out?

In many cases, better usability often depends on small changes, MS listens to users' opinions and puts some "inconspicuous" Also played a small thing" joined the Windows 7 firewall. For example, when you create a firewall rule in Vista, you must list each IP address and port separately. Now you only need to specify a range, so the time spent on performing general management tasks is greatly reduced.

You can also create Connection Security Rules in the firewall console to specify which ports or protocols have the need to use IPsec without having to use the netsh command. For those who like the GUI, this is A more convenient improvement.

Connection Security Rules also supports dynamic encryption. This means that if the server receives an unencrypted (but verified) message from the guest, the security association will request encryption through the agreed "running" to establish a more secure communication.

Configuring Profiles in Advanced Settings

Using the Advanced Settings control panel, you can set up profiles for each network type.