Windows Firewall is an updated version of the original Internet Connection Firewall in Windows XP Service Pack 2. By default, the firewall is open on all NIC interfaces. Whether it is a new installation of Windows xp or Upgrade installation, this option can provide more protection for network connections by default. However, if some applications are not working in this firewall filtering state, they will not be compatible with this new operating system. Updates
User Interface and New Features To configure Windows Firewall, you can open it from the Security Center. The Security Center is located in the Control Panel. Of course, you can also open the Windows Firewall Console directly from the Control Panel. There is also a third option. Enter the firewall console in the Advanced tab of the network connection. There are 3 options in the main tab: Enabled (Recommended) Do not allow exceptions to be turned off (not recommended) When you choose not to allow exceptions, Windows Firewall will block all network requests that connect to your computer, including in the Exceptions tab. List of applications and system services. In addition, the firewall will also intercept file and printer sharing, as well as network device detection. Using a Windows Firewall that does not allow exceptions is more appropriate for connecting to a personal computer on a public network, such as a computer that is commonly used at hotels and airports. Even if you use the Windows Firewall with the Exceptions option, you can still browse the web, send an email, or even use communications software. Programs and ports that block rule exceptions are allowed in the Exceptions tab to allow specific inbound traffic. For each exception, you can set a scope accordingly. For home and small office application networks, it is recommended to set the scope to a possible local network. Of course, you can also manually set the scope of the IP in the scope. In this way, only network requests from a specific range of IP addresses can be accepted. There is also a button to add a program in the Exceptions tab. If you want other clients on the network (outside the firewall) to be able to access a particular program or service on your local machine, and you don't know which port and which type of port the service or service will use, in this case You can add this program or service to the Windows Firewall exception to ensure it is accessible externally. The following settings can be configured in the Advanced tab: Connection-specific rule security record configuration on each network interface
Global ICMP rules, allowing Internet sharing and delivery errors and errors on the network through the Internet Control Message Protocol (ICMP) status information. By default, all Windows Firewall settings can be restored to their default state. We can configure different rules for different network connections. Combining the settings in the Exceptions with the additional settings for the network connection in the Advanced Options is called the Windows Firewall "resultant set". The following settings can be configured in the Advanced tab: Connection-specific rule security record configuration on each network interface
Global ICMP rules, allowing Internet sharing and delivery errors and errors on the network through the Internet Control Message Protocol (ICMP) status information. By default, all Windows Firewall settings can be restored to their default state. We can configure different rules for different network connections. Combining the settings in the Exceptions with the additional settings for the network connection in the Advanced Options is called the Windows Firewall "resultant set". Command Line Tools
Windows Firewall configuration and status information is available through the command line Netsh.exe. We can use the netsh firewall command to get firewall information and modify firewall settings. Commands in this context: --------------------------------------------- Add - Adds firewall configuration. delete - Deletes firewall configuration. dump - Displays a configuration script. help - Displays a list of commands. reset - Resets firewall configuration Show - sets firewall configuration. show - shows firewall configuration. Security warnings
In Windows XP SP2, when a user runs an application locally and will serve as an Internet server, Windows Firewall will pop up a new one. Security warning dialog (pictured above). You can add this application or service to the Windows Firewall exception using the options in the dialog. The exception configuration of the Windows Firewall allows for specific inbound connections. If the program does not work properly after using this method, you can isolate the problem by the following analysis steps: Add the program to the exception; Add the port to the exception; Use the firewall security record; Disable the firewall (not recommended).