[Alug] Port 5005

Hi Folks I've been trying to get a distributed application working over a network. Most of the inter-process communications are handled by a low level server using the TCP/IP stack. For remote processes, communications use port 5005. Not being particularly clued up on low level networking, how do I enable this port ? Just throw an extra problem in, is there likely to be any problems communicating with a Windows box on this port ? Regards, Paul.