Have a Win2k server setup with ISA Server acting as a firewall. Behind it I have 2 FTP sites running on 2 seperate machines with the external addresses on the firewall forwarding FTP requests to those sites. The problem is that when Someone makes a request for FTP site B the response from the server goes out with the IP of Site A so any firewall at the client side is blocking the responses since there are no clients trying to establish a connection with that IP address. Is there anyway of having it set to send back responses with the appropriate IP address on the data?