Comparisons anchored on Zeek, the BSD-licensed passive network traffic analyzer used for network security monitoring: against Snort.
Network security monitoring against signature-based intrusion prevention: Zeek's BSD-licensed analyzer that writes connection, DNS, HTTP and TLS logs and runs detection as scripts, against Cisco's GPL-2.0 Snort 3 with free Community rules, paid Talos Subscriber rules and inline blocking. Covers why many SOCs run both, the operating effort of each and which to deploy first.
Zeek's protocol logs and scripting against Arkime's full packet capture and session search: storage and retention trade-offs, why Malcolm runs both and parses ICS protocols with each, and when a team needs metadata, packets or both.
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