现在，您已经学习了如何建立基本的规则和链以及如何从信息包过滤表中添加或删除它们。

Now you've learned how to build basic rules and chains and how to add or remove them from the packet filtering tables.

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不过，为了让头脑风暴方式能最好的发挥作用还需要建立一些简单的基本规则。

For brainstorming to work at its best level, however, some simple ground rules need to be established.

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第一步，需要建立一些基本的规则。

The first step is to establish some ground rules.

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