I have a netopia 3341 dsl router with a static ip from the ISP. I also have a netgear fvs318 firewall installed behind it. I want to install an exchange server behind the firewall. I created a pinhole for port 25 in the netopia router and a service in the netgear to open port 25. My MX record points to the static ip on the dsl router. I can't telnet using port 25 to the static ip from outside. Do I need to use bridge mode on the router or should it work with the open ports?