The nat table is used for packets to be forwarded and consists of PREROUTING, OUTPUT, and POSTROUTING chains.

nat表用于要转发的信息包，它包含PREROUTING 、OUTPUT和POSTROUTING链。

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This table contains rules to mark packets for advanced routing and it consists of PREROUTING and OUTPUT chains.

该表包含一些规则来标记用于高级路由的信息包，该表包含PREROUTING和OUT put链。

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There are many other chain types available like PREROUTING and POSTROUTING and there is also provision for user-defined chains.

另外，还有其它许多可用的链的类型（如PREROUTING和POSTROUTING ）， 以及提供用户定义的链。

youdao

There are many other chain types available like PREROUTING and POSTROUTING and there is also provision for user-defined chains.

另外，还有其它许多可用的链的类型（如PREROUTING和POSTROUTING ）， 以及提供用户定义的链。

youdao