Allows Windows Firewall to record information about the unsolicited incoming messages that it receives. If you enable this policy setting, Windows Firewall writes the information to a log file. You must provide the name, location, and maximum size of the log file. The location can contain environment variables. You must also specify whether to record information about incoming messages that the firewall blocks (drops) and information about successful incoming and outgoing connections. Windows Firewall does not provide an option to log successful incoming messages. If you disable this policy setting, Windows Firewall does not record information in the log file. If you enable this policy setting, and Windows Firewall creates the log file and adds information, then upon disabling this policy setting, Windows Firewall leaves the log file intact. In the Windows Firewall component of Control Panel, the "Security Logging" settings are cleared and administrators cannot select them. If you do not configure this policy setting, Windows Firewall behaves as if the policy setting were disabled, except that administrators can choose whether to select the "Security Logging" settings.