Definition: NIDS (Network Intrusion Detection System)

NIDS or Network Intrusion Detection System are solutions that analyze traffic and try to find unusual activities, like scanning, intrusion attempts, lateral movements, exfiltration, backdoors, command and control, etc. This was initially done through signatures, but over time some solutions evolved to NTA. XDR/ NTA includes NIDS features with more than 80,000 regularly updated rules.