CloseTheDoor可以识别本机(IPv4/v6)监+听的所有端口及其相关程序文件，这将有助于检测安全漏洞和关闭不必要的端口来防止远程攻击。CloseTheDoor与CurrPorts及tcpview类似，但CloseTheDoor功能更强一点。CloseTheDoor提供安全版和绿色便携版，CloseTheDoor能够显示所有监+听端口，监+听的协议、进程、进程ID、相关服务。工具主要特点：
  Locate the executable file – Opens the folder that contains the process executable.
  Terminate this process – Terminates the process directly. May only be temporary if the process restarts automatically.
  Process services – Displays all services that are linked to the process.
  Google… – Research the port, process on Google.
  Wikipedia… – Research the port, process on Wikipedia.
  Usage statistics of this port – Look up statistics
  Port authority database – Provides information about most ports.
工具下载：http://sourceforge.net/projects/closethedoor/files/v0.2/