[02/03] IP/Router ?

I have 2 station in a router and 1 out of the router.
1 of the 2 station is a Server, how do i use the computer which is out of the router to actually send XML Tags ?

Can someone help me out with this?

I guess that there is something like this:
(sorry for painting but i had to hurry)

Thank you, that was very helpful.