此选项可扩大或缩小侦听套接字的范围，从而使得公共用户和私人用户可以在适当情况下对站点进行无限制的访问，或者可以根据需要对同一站点进行有限制的访问。

This option widens or Narrows the scope of a listening socket, enabling unrestricted access from public and private users when appropriate, or restricting access only to the same site, as required.

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