[cs631apue] Router problem

[Chenyi Zhang]

When I am trying to send some message to my friend, It can not be reached
because of router IP is not your own IP.

My router IP is 108.5.114.***
but, my computer is just 192.168.***.***

That means the socket only sent to the local area network:  (

Does anyone know how to sent package cross the routers?
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