Thanks, I have been running 3.22 firmware in the router since the new year. I don't see 3.23, although I see a newer 3.22 which says it is Beta only for hang during Half-life game (I don't play games even though I know the founders of that company).<br><br>I agree the problem relates to my router config - I have set it its NAT/SUA thing to forward default access to a Win2K PC (but special-case a few UDP/TCP ports to another machine). If I was letting the router itself answer the ICMP for the external IP address then I doubt there would be such a problem.<br><br>