A lot of stuff in the log from the Firewall showing every 5 or 10 minutes (The firewall is set to allow only essential services and enable stealth mode) :from the log ie Stealth Mode connection attempt to TCP with a lot of numbers to and from. At the moment the situation is working by using the old modem. If I can get the install cd where I can provision from here instead of calling in, I will use it from my backup drive and retest the new modem (though I am now pretty sure it will work as it worked for a week) . If the problem recurs, which I hope not, would a router stop the direct connection to my computer, act as a barrier per se. Wireshark seems a little above me at the moment. Thanks Mark