IP data duplication and forwarding

We have a constant stream of data being sent by a provider to a specific Windows server at xxx.xxx.xxx.001 We are forwarding that data from xxx.xxx.xxx.123 to another machine located at xxx.xxx.xxx.002 But we need to forward a copy (duplicate) of that same data to xxx.xxx.xxx.003, and also to xxx.xxx.xxx.004 etc. IPCOP can't do this, because it says "Source port already in use" when I try to add a second port (it won't duplicate data). How can we duplicate and forward data under IPCOP or in Windows? I'm guessing that we need something running on each of the windows servers like a chain: when 002 receives the data, it processes the data and simultaneously forwards it to .003, and on to 004, etc. So If there is no way to do this in IPCOP, can you suggest a tool/firewall that would accept data on Windows and forward it to another machine? Our Windows servers are running in Amazon EC2 and the Linux box (where the data is received initially) is running in our data center.