Using Multi Server TCP/IP option

We have a inbound connection that we want to limit the client IP that can connect to it.  We are wanting to verify that only the “trusted source” client IP can access the inbound connection.  I’m attempting to use Multi Server to limit an inbound client connection to only one client IP.  However, in testing it, I tried different scenarios to make sure it works.   I set the maximum number of connections at 2 (to be sure it works on our server as designed) and all connections worked perfectly.  I set the maximum number of connections to 1 to verify how it works.  Using the 2 client connections from the previous example, I first brought up one client thread and it connected.  The second client connection would not connect.  Just as I figured.  However, if I brought down the 1st client connection, then the second would connect.

How do I restrict it so that only the client IP that I know is a trusted source will be allowed to connect to the server thread?   I checked the *.cli file in the process directory but the contents changed depending on which client thread is up at the time.

Thanks..

Thomas G. Rioux