Yes, PC Flank says it cannot establish my IP Address. I am behind a router, but for the test switched to dial up so that my router is not scanned. I also use Proxomitron local proxy, but despite disabling it, no go. Firewall is Comodo. They must use a different method to Shields Up. Here all my ports are stealthed. I trust Shields Up - been around a long time. Should I be satisfied with just the Shields Up scan ? The Speedguide scan also seems ridiculous. According to that scan I have 3 telnet tcp (23) ports of which 2 are stealthed (filtered), and one open. Similar scenario for http (80) ports, and tcp 135 (despite showing access denied in the Comodo logs). Ah, the joys of fooling around with firewalls and scans ! As far as I am concerned my computer is safe and I have had no trouble for quite some time (touch wood). NOD32 is also my friend. Main question, I would really like to do the PC Flank port scan - any advice will be highly appreciated !