Glossary / SIEM (Security Information and Event Management)
SIEM (Security Information and Event Management)
A platform that aggregates log and event data from across an environment into one place and correlates it to surface signs of a security incident that no single log source would reveal on its own.
A SIEM ingests logs from firewalls, servers, endpoints, cloud services, and applications, normalizes them into a common format, and applies correlation rules to catch patterns a human scanning one log at a time would miss — a failed login on one system followed by a successful one from an unusual location minutes later, for instance.
SIEM adoption was historically driven as much by compliance log-retention requirements as by active threat detection — plenty of early deployments existed mainly to satisfy an auditor's "do you retain logs" question, and only later got tuned into an actual detection tool.
A SIEM is only as good as its rule tuning and the team watching it. A misconfigured or freshly-deployed SIEM tends to generate an overwhelming volume of low-value alerts, which is the same alert-fatigue problem a NOC or SOC runs into — the tool doesn't solve the staffing and tuning problem on its own, it just moves where that problem shows up.
How Nexus handles this
Nexus doesn't run a SIEM correlation engine — its security suite surfaces vulnerability and breach-monitoring findings directly as prioritized, ownable tickets in the same PSA record, aiming at the same "stop drowning in low-value alerts" problem a SIEM addresses, from the ticketing side rather than the log-correlation side.
More terms
MSP (Managed Service Provider)
A company that remotely manages a client's IT infrastructure and end-user systems on an ongoing, proactive basis — usually a flat-fee contract, not break-fix billing.
RMM (Remote Monitoring and Management)
Software that lets an MSP monitor device health and perform remote management tasks — patching, scripting, remote control — across every client site from one console.
PSA (Professional Services Automation)
Software that runs the business side of MSP operations — ticketing, SLAs, billing, contracts, and client records — the system of record most MSP work flows through.
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