Microsoft
microsoft.com › en-us › security › business › security-101 › what-is-siem
What Is SIEM? | Microsoft Security
Learn how security information and event management (SIEM) solutions support threat protection for organizations. ... One essential component of effective cybersecurity is a security information and event management (SIEM) solution. These types of solutions collect, aggregate, and analyze large ...
What exactly are SIEM tools and how important are they? Is there any online resource I can learn from for free?
A properly-tuned SIEM is supposed to ingest a crapload of logs/info and make decisions on which events constitute something to worry about security-wise. From my experience, many/most organizations that have a SIEM have no idea how to use it and expect it to do stuff out of the box and it ends up just sitting there being expensive. That said, a properly tuned SIEM is very useful. More on reddit.com
What SIEM do you recommend?
Splunk if you have deep pockets. Whatever SIEM you choose, make sure you have an ACTUAL data strategy, with schemas, documentation, logging standards, etc. etc. All of the issues I’ve seen with SIEMs stem from a company that DOES NOT have a data culture and thinks “I’ll just log data and let the analytics sort it out….Fucking. No. More on reddit.com
What is SIEM?
SIEM can be a valuable component in a mature security strategy. But before you leap into a SIEM purchase, it’s critical to look into the key limitations that could leave your organization vulnerable to cyberattacks: More on reddit.com
How important is your SIEM?
To gauge effectiveness, you could compare your incident detection timeline pre- and post-SIEM implementation. I suppose that would validate the SIEM, but I'm not sure anyone really does that. The value of a SIEM is largely accepted as a requirement for a mature security posture. A specific implementation might not be effective, but I'm not sure if that's the question you're asking. More on reddit.com
Videos
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Palo Alto Networks
paloaltonetworks.ca › cyberpedia › what-is-siem
What is SIEM? - Palo Alto Networks
These systems use threat intelligence feeds to compare known attack patterns with new behaviors. This improves their ability to identify threats and respond quickly, giving security teams real-time alerts and automated responses. SIEM tools help organizations stay prepared against evolving cyber threats by improving detection methods and using up-to-date threat information.
CrowdStrike
crowdstrike.com › en-us › cybersecurity-101 › next-gen-siem › security-information-and-event-management-siem
Security Information & Event Management (SIEM) | CrowdStrike
August 12, 2025 - Security information and event management (SIEM) is a tool designed to help organizations detect, respond to, and manage security threats in real time by collecting and analyzing log data from across your entire IT environment, such as servers, endpoints, applications, and network devices.
subsection within the field of computer security, where software products and services combine security information management and security event management
Wikipedia
en.wikipedia.org › wiki › Security_information_and_event_management
Security information and event management - Wikipedia
October 23, 2025 - The integration of SIM and SEM within SIEM provides organizations with a centralized approach for monitoring security events and responding to threats in real-time. First introduced by Gartner analysts Mark Nicolett and Amrit Williams in 2005, the term SIEM has evolved to incorporate advanced features such as threat intelligence and behavioral analytics, which allow SIEM solutions to manage complex cybersecurity threats, including zero-day vulnerabilities and polymorphic malware.
Fortinet
fortinet.com › resources › cyberglossary › what-is-siem
What is SIEM? How Security Information & Event Management Works
With the average organization’s security operations center (SOC) receiving more than 10,000 alerts per day, and the biggest enterprises seeing over 150,000, most enterprises do not have security teams large enough to keep up with the overwhelming number of alerts. However, the growing risk posed by ever more sophisticated cyber threats makes ignoring alerts quite dangerous. A single alert may mean the difference between detecting and thwarting a major incident and missing it entirely. SIEM security delivers a more efficient means of triaging and investigating alerts.
Logpoint
logpoint.com › en › what-is-siem
What is SIEM? A complete beginners guide to SIEM and Logpoint.
It provides a comprehensive and centralized view of the security posture of an IT infrastructure and provides cybersecurity professionals with insights into the activities within their IT environment. Logpoint builds on top of their SIEM by consolidating different security tools to automate investigation and response, perform incident management, or detect threats that otherwise would go unnoticed.
Gartner
gartner.com › all categories › security information and event management
Security Information and Event Management (SIEM)
Leveraging the potency of cloud-scale security log management, behavioral analytics and automated investigation mechanisms, it effectively counteracts insider threats, nation states, and various forms of cyber criminals. The firm maintains a comprehensive understanding of normal behavior, adapting as this baseline shifts, which empowers security operations teams with a complete perspective on incidents for swift and thorough response. ... IBM is a well-established entity focused on technology and development.
Internal Revenue Service
irs.gov › privacy-disclosure › security-information-and-event-management-siem-systems
Security information and event management (SIEM) systems | Internal Revenue Service
SIEM is an approach to security management that combines event, threat and risk data into a single system to improve the detection and remediation of security issues and provide an extra layer of in depth defense.
Coursera
coursera.org › coursera articles › it › networks and security › security information and event management (siem): a guide
Security Information and Event Management (SIEM): A Guide | Coursera
Learn how to make a start and how to improve your SIEM abilities. SIEM is a technology that combines security information management (SIM) and security event management (SEM) to collect, analyze, and store security data across an organization.
Published September 11, 2025 Views 764
NIST CSRC
csrc.nist.gov › glossary › term › security_information_and_event_management_tool
Security Information and Event Management (SIEM) Tool - Glossary | CSRC
... A | B | C | D | E | F | G | ... to LinkedIn Share ia Email ... Application that provides the ability to gather security data from information system components and present that data as actionable information via a single interface....