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处理对extranet访问的限制要比处理对intranet访问的限制复杂得多。其原因很大程度上是由于extranet不能独立运转。 Intranet中供外部使用的部分一般位于其所设防火墙内并用另一防火墙网关与供内部使用的部分相分隔。最外层的防火墙最易被渗透,大多数情况下主要用于防止外部资源被任意滥用而不用
Handling restrictions on extranet access is much more complicated than handling restrictions on intranet access. The reason is largely due to extranet can not operate independently. The portion of the intranet that is intended for external use is typically located within its own firewall and separated by another firewall gateway from the portion for internal use. The outermost firewall is the most easily infiltrated, and in most cases it is mainly used to prevent external resources from being abused