I have a Win2k domain with XP, 2K, NT, and a few 9x clients. I have noticed that the 2K and XP machines are sending out quite a few ICMP Echo packets. All of the machines have current MS service packs and patches, and current virus dats (McAfee, dated July 8). I checked the HKLM\Software\Microsoft\Windows\CurrentVersion\Run key, and all services, and startup. Nothing strange. Is this something new with 2000 and XP? (No NT or 9x machines are doing this) or is there something I'm missing? How can I reduce this traffic? Thanks!