Best Intrusion Detection and Prevention Systems for Linux of 2025

Empower your current team to achieve enterprise-level security All-in-one SIEM solution with endpoint visibility, 24/7 monitoring and automated response. Reduce complexity, increase visibility, and speed up response time. We do the heavy lifting so you can get back to your daily routine. Blumira's out-of-the box detections, prefiltered alerts and response playbooks can help IT teams achieve real security value. Quick Deployment and Immediate Results: Integrates into your tech stack, fully deploys in hours, without any warm-up period. All-You-Can-Eat: Predictable pricing, unlimited data logging and full-lifecycle detection. Compliance Made Easy - Includes 1 year data retention, pre-built reports and 24/7 automated monitoring 99.7% CSAT support: Solution Architects to support product support, Incident Detection and Response Team for new detections and 24/7 SecOps Support

Heimdal® Endpoint Detection and Response is our proprietary multi-solution service providing unique prevention, threat-hunting, and remediation capabilities. It combines the most advanced threat-hunting technologies in existence: Heimdal Next-Gen Antivirus, Heimdal Privileged Access Management, Heimdal Application Control, Heimdal Ransomware Encryption Protection, Heimdal Patch & Asset Management, and Heimdal Threat Prevention. With 6 modules working together seamlessly under one convenient roof, all within one agent and one platform, Heimdal Endpoint Detection and Response grants you access to all the essential cybersecurity layers your business needs to protect itself against both known and unknown online and insider threats. Our state-of-the-art product empowers you to quickly and effortlessly respond to sophisticated malware with stunning accuracy, protecting your digital assets and your reputation in the process as well.

Imunify360 provides security solutions for web-hosting servers. Imunify360 is more than antivirus and WAF. It combines an Intrusion Prevention & Detection system with an Application Specific Web Application Firewall, Real time Antivirus protection, and Patch Management components into one security suite. Imunify360 is fully automated and displays all statistics in an intuitive dashboard.

Traditional packet filters are gradually becoming outdated, as even open-source solutions are shifting towards Next-Generation Firewalls. OPNsense stands out as a leading option for features like intrusion detection, application control, web filtering, and antivirus protection. No network, regardless of its size, is immune to potential attacks; even devices in home networks, such as washing machines and smartwatches, are at risk and need robust security measures. Firewalls play a crucial role in a comprehensive security strategy, shielding systems from both established and emerging threats. The effectiveness of a firewall is maximized when its capabilities are well understood, it operates intuitively, and is strategically placed within the network infrastructure. OPNsense rises to the occasion by fulfilling these essential requirements in various ways. This book serves as an invaluable guide for anyone looking to comprehend, install, and configure an OPNsense firewall effectively. Ultimately, understanding the intricacies of OPNsense can empower users to create a more secure digital environment.

ACSIA is a 'postperimeter' security tool that complements traditional perimeter security models. It is located at the Application or Data Layer. It protects the platforms (physical, VM/ Cloud/ Container platforms) that store the data. These platforms are the ultimate targets of every attacker. Many companies use perimeter defenses to protect their company from cyber adversaries. They also block known adversary indicators (IOC) of compromise. Pre-compromise adversaries are often carried out outside the enterprise's scope of view, making them harder to detect. ACSIA is focused upon stopping cyber threats in the pre-attack phase. It is a hybrid product that includes a SIEM (Security Incident and Event Management), Intrusion Detection Systems, Intrusion Prevention Systems, IPS, Firewall and many other features. - Built for linux environments - Also monitors Windows servers - Kernel Level monitoring - Internal Threat detection

The Suricata engine excels in real-time intrusion detection (IDS), inline intrusion prevention (IPS), network security monitoring (NSM), and offline packet capture (pcap) processing. It analyzes network traffic using a robust and comprehensive set of rules and signature languages, complemented by advanced Lua scripting capabilities that allow for the identification of intricate threats. Its compatibility with standard input and output formats such as YAML and JSON simplifies the integration with various tools, including established SIEMs, Splunk, Logstash/Elasticsearch, Kibana, and other databases. The development of Suricata is driven by a vibrant community focused on enhancing security, usability, and efficiency. Additionally, the project is managed and endorsed by the Open Information Security Foundation (OISF), a non-profit organization dedicated to fostering the ongoing development and success of Suricata as an open-source initiative. This commitment not only ensures the software's reliability but also actively encourages community contributions and collaboration.

OSSEC is completely open source and available at no cost, allowing users to customize its functionalities through a wide range of configuration settings, including the addition of personalized alert rules and the creation of scripts to respond to incidents as they arise. Atomic OSSEC enhances this capability by assisting organizations in fulfilling specific compliance standards like NIST and PCI DSS. It effectively identifies and notifies users of unauthorized alterations to the file system and any malicious activities that could jeopardize compliance. The Atomic OSSEC detection and response system, built on open-source principles, enriches OSSEC with thousands of advanced rules, real-time file integrity monitoring (FIM), regular updates, software integrations, built-in active response features, a user-friendly graphical interface (GUI), compliance resources, and dedicated professional support. This makes it a highly adaptable security solution that combines extended detection and response (XDR) with compliance capabilities in one comprehensive package. Its flexibility and thoroughness make it an invaluable tool for organizations aiming to bolster their security posture while maintaining compliance.

Atomic Enterprise OSSEC, the commercially enhanced version the OSSEC Intrusion Detection System, is brought to you by the sponsors. OSSEC is the most widely used open-source host-based intrusion detection software (HIDS) in the world. It is used by thousands of organizations. Atomicorp adds to OSSEC with a management console, advanced file integrity management (FIM), PCI auditing and reporting, expert assistance and more. - Intrusion Detection - File Integrity Monitoring - Log Management - Active Response OSSEC GUI and Management OSSEC Compliance Reporting – PCI, GDPR and HIPAA compliance Expert OSSEC Support Expert support for OSSEC agents and servers, as well as assistance in developing OSSEC rules. More information about Atomic Enterprise OSSEC can be found at: https://www.atomicorp.com/atomic-enterprise-ossec/

Regardless of whether your data resides in a cloud setting—be it private, public, or hybrid—or is managed on-premises, Armor is dedicated to ensuring its protection. Our approach focuses on identifying genuine threats and eliminating noise through robust analytics, automated workflows, and a dedicated team of specialists available around the clock. In the event of an attack, our response does not stop at simply issuing alerts; our experts in the Security Operations Center spring into action, providing guidance to your security team on effective response strategies and resolution techniques. We prioritize the use of open-source software and frameworks, as well as cloud-native solutions, which liberates you from traditional vendor lock-in. Our infrastructure as code (IaC) based model for continuous deployment seamlessly fits into your current DevOps pipeline, or we can take over stack management entirely. Our mission is to empower your organization by making security and compliance not only accessible but also clear and straightforward to implement and sustain over time. By doing so, we enhance your overall operational resilience in an increasingly complex digital landscape.

CrowdSec, a free, open-source, and collaborative IPS, analyzes behaviors, responds to attacks, and shares signals across the community. It outnumbers cybercriminals. Create your own intrusion detection system. To identify cyber threats, you can use behavior scenarios. You can share and benefit from a crowdsourced, curated cyber threat intelligence platform. Define the type and location of the remediation you wish to apply. Use the community's IP blocklist to automate your security. CrowdSec can be run on containers, virtual machines, bare metal servers, containers, or directly from your code using our API. Our cybersecurity community is destroying cybercriminals' anonymity. This is our strength. You can help us create and distribute a qualified IP blocklist that protects everyone by sharing IP addresses you have been annoyed by. CrowdSec can process massive amounts of logs faster than Fail2ban, and is 60x faster than Fail2ban.