Tool: Network Intrusion Detector (NID) Description: NID is an Ethernet Monitoring tool that checks packet streams for known suspicious security activities. Session isolation and replay capabilities are offered. Availability: While not available to the general public, it is available free of charge to all U.S. Department of Energy sites and contractors, send E-mail to ciac@llnl.gov. It is also available to all U.S. Department of Defense organizations via DISA's ASSIST Team. E-mail to assist@assist.ims.disa.mil.