WinXP SP2 comes with firewall settings (2)

& ldquo; any computer & rdquo; allows abnormal traffic from any ip address.
“Only my network (subnet)”
Only allow abnormal traffic from the following ip address, ie it matches the local network segment (subnet) to which the network connection receiving the traffic is connected . For example, if the IP address of the network connection is configured to 192.168.0.99 and the subnet mask is 255.255.0.0, then the abnormal traffic only allows ip addresses from 192.168.0.1 to 192.168.255.254.
When you want to allow a local home network to connect to a computer on the same subnet to access a program or service, but you don't want to allow potentially malicious internet users to access it, then "just my network" Network) & rdquo; The set address range is very useful.
Once a program or port has been added, it is disabled by default in the "Programs & Services" list.
All programs or services enabled on the "Exceptions" tab are enabled for all connections selected on the "Advanced" tab.
“Advanced"tab
“Advanced”tab contains the following options:
Network Connection Settings, Security Log, icmp, Default Settings
“Network Connection Settings”
In <quo;Network Connection Settings", you can:
1. Specify the interface set on which you want to enable Windows Firewall. To enable Windows Firewall, check the box next to the network connection name. To disable the Windows Firewall, clear the check box. By default, Windows Firewall is enabled for all network connections. If a network connection does not appear in this list, then it is not a standard network connection. Examples of this include custom dialers provided by the internet service provider (ISP). 2. Configure the advanced configuration of the individual network connections by clicking on the network connection name and then clicking on “Settings". If you clear all the checkboxes in the "Network Connection Settings", Windows Firewall will not protect your computer, regardless of whether you have selected "Enable (Recommended)" on the “General” tab. . If you select "Allow abnormal traffic" on the “General" tab, then the settings in "Network Connection Settings" will be ignored, in which case all interfaces will be protected. When you click “Set", the “Advanced Settings” dialog box will pop up. On the “Advanced Settings” dialog, you can configure specific services in the “Services” tab (configured only on tcp or udp ports) or enable specific types in the “icmp” tab. Icmp traffic. These two tabs are equivalent to the settings tab of the icf configuration in windows xp (pre-sp2 version).
“Security Log"
In the "Security Log", please click "Settings" to specify the configuration of the Windows Firewall Log in the "Log Settings" dialog box, in &ldquo In the Log Settings dialog box, you can configure whether you want to log dropped packets or successful connections, as well as specify the name and location of the log file (the default is systemrootpfirewall.log) and its maximum capacity.
“icmp”
In “icmp”, click “Set" to specify the allowed icmp traffic type in the “icmp” dialog box, in the “icmp” dialog box, You can enable and disable the type of icmp messages that Windows Firewall allows for incoming connections on all the options selected on the “Advanced tab. The icmp message is used to diagnose, report error conditions, and configuration. By default, no icmp messages are allowed in this list.
A common step in diagnosing connection problems is to use the ping tool to verify the address of the computer you are trying to connect to. At the time of verification, you can send an icmp echo message and then get an icmp echo reply message as a response. By default, Windows Firewall does not allow incoming icmp echo messages, so the computer cannot send back an icmp echo reply message as a response. In order to configure the Windows Firewall to allow incoming icmp echo messages, you must enable “Allow incoming echo requests” settings.
“Default Settings 
Click “Restore Defaults  to reset the Windows Firewall back to its initial installation state. When you click “ Restore Defaults>, the system prompts you to verify your decision before the Windows Firewall settings change.