Isa Server 2000 and Exchange Server 2000 are installed two Windows 2000 Advanced Servers. We use Cisco 1720 Router for our internet connection and not used an ISP. Connection is direct. Web server and mail server is still working. But I get an event message (ID 1720) on isa server installed server continuous. Thank you for your assistance. Sincerely, Orhan Tuygun orhan.tuygun@xxxxxxxxxxxxx