When an application wants to send data to another host, UDP builds a header that includes a source port, a destination port which provides an address for delivering messages. 当应用软件向另一主机发送数据时,UDP协议生成一个数据头,包括源端口,目的地端口。这些端口提供为送达信息所需要的地址。
With the ability to control every facet of forwarding a port, you can forward based on things like Destination Address, Destination Port, Protocol, Source Interface, and Source Address. 它具备控制端口转发的任意一个细节的能力,你可以基于目标地址、目标端口、协议、网卡和源地址来设置端口转发。