I tried the DMZ trick too but a quick check on grc.com - shields up showed that all stealth had gone and ports 23 (telnet) and 80 (http) were wide open. I know the 10V is only a telephone adapter pretending to be a router but who knows? It did however work for 5 minutes, then I got cold feet. One forum post I saw actually recommended 23 and 80 TCP to be opened. He must be mad!
Derek