I am trying to figure out why all my ISP quota is been eaten up, 5GB per day, we use no torrenting software havent downloaded anything (happened on a saturday while no one was in the office). Also wireless was using WPA2 but is now turned off, router firewall is only allowing a few select ports through like VPN and mail. Port scanners dont show unusual ports open.
the network runs a SBS 2008 server and 3 XP clients, server is updated and the network is protected by Trend Micro Worry Free Advanced - the console has not reported any viruses, spyware or high volumes of spam.
any ideas? thanks