[SQU] tcp/ip mapping with Squid

How can I configure Squid in order to allow a client program to connect to a service that is provided by a port number and a iIP addres ?

I am a program to contact with a private server, the program must know the port and de IP addres of the server,
directly all work well, but through Squid it doesn't work.

Without Squid:
    __________ __________
    | program |--------------------------------> | server |
    ----------------- -----------------
                                                            The server use the port xxxx and the ip aaa.bbb.ccc.ddd to serve
                                                             the program calls

With Squid:

    __________ __________ __________
    | program |------------- | Squid |-------------------> | server |
    ----------------- ------------------- -----------------
                                                                    xxxx
                                                                    aaa.bbb.ccc.ddd

How can i bypass the program resquests throug Squid in order they can arrive to my private server ?
How can make port mapping with Squid ?

Thanks !!

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