Max, chances are you are using either a firewall, NAT (Network Addressing Transforms) or a combination of both. In the case of the firewall, you have to adjust the address transforms to use the original client's IP address instead of the firewall gateway. In the case of NAT I am afraid I cannot help as I have never used it before. However the prinicipal should be the same. If you are using firewall software, what software are you running?