如何用iptable設定server上轉到內部網路的mms - Linux

我的電腦架構IP假設如下,

internet -> eth0 (1.2.3.4)
server
eth1 (192.168.100.1) -> pc(windows Media encoder)(192.168.100.2)

請問我server上的iptables要怎樣下指令將外面連進來的mms
轉到pc(windows Media encoder)那一台呢?

mms://1.2.3.4:8080

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