{"id":19367,"date":"2026-02-23T11:20:29","date_gmt":"2026-02-23T11:20:29","guid":{"rendered":"https:\/\/iprovpn.com\/resources\/?p=19367"},"modified":"2026-02-23T11:20:29","modified_gmt":"2026-02-23T11:20:29","slug":"what-are-intrusion-detection-systems","status":"publish","type":"post","link":"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/","title":{"rendered":"What Are Intrusion Detection Systems?"},"content":{"rendered":"<p><span style=\"font-weight: 400\">Cyber threats change fast these days. German businesses and key infrastructure operators deal with their own set of problems and rules. Car plants in Bavaria, energy grids in the Ruhr region, and factories across the country all need solid protection for data, machines, and the economy. Intrusion detection systems watch network traffic and system activities to spot possible attacks early and stop them from causing major damage.<\/span><\/p>\n<p><span style=\"font-weight: 400\">        <div class=\"iprovpn_btn_cta_row\">\n    \t<a class=\"btn_cta\" href=\"https:\/\/iprovpn.com\/buy-vpn\" title=\"Get iProVPN Now\">Get iProVPN NOW <i class=\"fas fa-long-arrow-alt-right\"><\/i><\/a>\n    \t<\/div>\n    <\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_75 ez-toc-wrap-center counter-flat ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<div class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/div>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #000000;color:#000000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #000000;color:#000000\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#What_Intrusion_Detection_Systems_Do\" >What Intrusion Detection Systems Do<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#How_Intrusion_Detection_Systems_Developed_Over_Time\" >How Intrusion Detection Systems Developed Over Time<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#Different_Kinds_of_Intrusion_Detection_Systems_Used_in_Germany\" >Different Kinds of Intrusion Detection Systems Used in Germany<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#The_Way_Intrusion_Detection_Systems_Operate\" >The Way Intrusion Detection Systems Operate<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#Why_Intrusion_Detection_Systems_Matter_So_Much_for_German_Critical_Infrastructure\" >Why Intrusion Detection Systems Matter So Much for German Critical Infrastructure<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#Real_Advantages_for_Companies_in_Germany\" >Real Advantages for Companies in Germany<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#Common_Problems_When_Setting_Up_Intrusion_Detection_Systems_in_Germany_and_How_to_Fix_Them\" >Common Problems When Setting Up Intrusion Detection Systems in Germany and How to Fix Them<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#Steps_German_Sites_Should_Follow_When_Adding_Intrusion_Detection_Systems\" >Steps German Sites Should Follow When Adding Intrusion Detection Systems<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#FAQs\" >FAQs<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#How_do_intrusion_detection_systems_differ_from_systems_that_also_block_attacks\" >How do intrusion detection systems differ from systems that also block attacks?<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#Does_every_company_in_Germany_have_to_use_intrusion_detection_systems\" >Does every company in Germany have to use intrusion detection systems?<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#Do_intrusion_detection_systems_help_meet_data_protection_rules_in_Germany\" >Do intrusion detection systems help meet data protection rules in Germany?<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#Can_smaller_German_firms_actually_pay_for_and_run_intrusion_detection_systems\" >Can smaller German firms actually pay for and run intrusion detection systems?<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#How_well_do_intrusion_detection_systems_catch_brand-new_unknown_attacks\" >How well do intrusion detection systems catch brand-new, unknown attacks?<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#Wrapping_Up\" >Wrapping Up<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/iprovpn.com\/resources\/what-are-intrusion-detection-systems\/#Start_Browsing_Privately\" >Start Browsing Privately!<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Intrusion_Detection_Systems_Do\"><\/span>What Intrusion Detection Systems Do<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400\">Intrusion detection systems keep an eye on networks and devices for anything that looks wrong or breaks the rules. They do not block traffic like firewalls. Instead, they collect information, check patterns, and send alerts so teams can act quickly.<\/span><\/p>\n<p><span style=\"font-weight: 400\">In Germany, this matters a lot because Industry 4.0 connects everything in factories. Intrusion detection systems protect both regular computer networks and the systems that run actual machines. The German Federal Office for Information Security calls these tools attack detection systems. They compare data against known bad patterns or normal everyday activity.<\/span><\/p>\n<p><span style=\"font-weight: 400\">German companies use intrusion detection systems to catch insider problems, hacker attacks, ransomware signs, and long-term hidden attacks. The economy here depends on safe supply chains for cars, chemicals, and exports. One small undetected problem can shut down lines at BMW or BASF and cost millions.<\/span><\/p>\n<p><span style=\"font-weight: 400\">These systems also help meet data protection laws. Quick spotting of issues keeps notification times short under German rules. For critical infrastructure sites, intrusion detection systems became required by law. The government knows that just blocking at the edge is not enough anymore against targeted attacks on German industry.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_Intrusion_Detection_Systems_Developed_Over_Time\"><\/span>How Intrusion Detection Systems Developed Over Time<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400\">People started working on intrusion detection systems back in the 1980s. Early research used statistics to spot unusual behavior in big computer systems. In the 1990s, companies built tools that looked for known attack signs as the Internet grew.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Germany paid more attention in the 2010s when industrial spying increased. A 2014 attack on a steel plant showed the risks. Hackers got in through email, moved to the production side, and caused a furnace to break down hard. The plant suffered real physical damage. This event pushed German rules to demand better monitoring between office networks and factory controls.<\/span><\/p>\n<p><span style=\"font-weight: 400\">New laws followed. The updated IT Security Act from 2021 made intrusion detection systems required for critical sites starting in May 2023. The office in charge published guides that explain exactly how to set them up. German firms like Rhebo in Leipzig now build tools made for factory equipment. These local solutions fit the way German industry works with connected machines and distributed power systems.<\/span><\/p>\n<p><span style=\"font-weight: 400\">The story shows that intrusion detection systems grew from simple checkers to must-have tools. In Germany, they match the move toward smart factories that need constant watching.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Different_Kinds_of_Intrusion_Detection_Systems_Used_in_Germany\"><\/span>Different Kinds of Intrusion Detection Systems Used in Germany<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400\">Several types exist, and German sites often mix them.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Network-based versions check traffic at key spots like gateways or switch ports. They catch scans, overload attacks, and bad protocol use. Car factories in Germany place them between the office and production areas to block sideways moves by attackers.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Host-based versions run directly on servers or controllers. They watch files, logs, running programs, and who logs in. Hospitals and data centers in Germany like these because they spot problems that already passed the network layer.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Wireless versions guard Wi-Fi and radio links. Warehouses and logistics centers use lots of connected devices, so these tools find fake access points and odd connections.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Some focus on specific industrial languages like Modbus or Profinet. Energy companies need these because their equipment speaks those protocols.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">Many places run combined systems that pull data together with logging platforms. This layered approach gives the level of view that German rules ask for in both computer and machine networks.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"The_Way_Intrusion_Detection_Systems_Operate\"><\/span>The Way Intrusion Detection Systems Operate<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400\">The process starts with gathering data from packets, logs, or device events. In critical German sites, this covers communication details and past records from both regular computers and factory gear.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Detection works in two main ways. One matches against lists of known attacks. The other learns what normal looks like over time and flags anything different. The learning phase is important in German plants where output changes with new products or work shifts.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Newer tools add behavior checks and learning algorithms. When something suspicious shows up, the system decides if it needs immediate attention or reporting to authorities under German law.<\/span><\/p>\n<p><span style=\"font-weight: 400\">For example, a sensor in a chemical plant near Ludwigshafen might notice an odd command in the control traffic and link it to strange login tries. The team then checks and decides the next steps while keeping production going.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_Intrusion_Detection_Systems_Matter_So_Much_for_German_Critical_Infrastructure\"><\/span>Why Intrusion Detection Systems Matter So Much for German Critical Infrastructure<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400\">Critical sectors like power, water, transport, finance, health, and IT keep Germany running. The 2021 security law requires intrusion detection systems in these areas to catch attacks on essential services. Operators must record and check activity all the time during normal work.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Energy storage firms in southern Germany monitor thousands of home batteries from central offices. Tools from Leipzig companies inspect data at the device level without slowing things down. This fits the country\u2019s push for renewable power spread across many locations.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Larger firms and those with public importance also face rules. New EU-wide rules will bring thousands more companies under stricter checks. Company leaders now carry direct responsibility for these systems.<\/span><\/p>\n<p><span style=\"font-weight: 400\">German factories moving to smart production see intrusion detection systems as part of safe growth instead of just another cost.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Real_Advantages_for_Companies_in_Germany\"><\/span>Real Advantages for Companies in Germany<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Early spotting cuts the time attackers stay hidden.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Rules get met more easily, and risk drops. Audits go smoother when systems prove they watch everything needed.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Daily operations often improve, too, because odd patterns can show broken setups or worn equipment. Small and medium firms in Germany use this extra info for maintenance planning.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Response to problems speeds up when alerts feed straight into security teams or outside services. Faster fixes mean less downtime.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">German exporters also gain trust when partners see strong local security. This helps keep supply chains strong worldwide.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">Reports from testing groups show firms with good intrusion detection systems face fewer full breaches and recover more quickly.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Common_Problems_When_Setting_Up_Intrusion_Detection_Systems_in_Germany_and_How_to_Fix_Them\"><\/span>Common Problems When Setting Up Intrusion Detection Systems in Germany and How to Fix Them<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400\">Too many alerts can bury teams, especially in big factories with complex machine networks. False warnings interrupt work in fast production lines.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Smaller sites and medium companies lack staff with special knowledge of factory protocols. Normal IT training does not cover those.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Old equipment does not always connect easily, and data rules require careful handling of logs.<\/span><\/p>\n<p><span style=\"font-weight: 400\">German guides suggest a step-by-step rollout from basic checks to full setup. Local tools keep the load low on limited devices. Training through official programs and partnerships with suppliers helps fill skill gaps.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Steps_German_Sites_Should_Follow_When_Adding_Intrusion_Detection_Systems\"><\/span>Steps German Sites Should Follow When Adding Intrusion Detection Systems<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400\">Start with a full risk check using standard attack lists for industrial controls. Begin monitoring at network edges, then move inside to important systems. Keep logs in one place with matching time stamps.<\/span><\/p>\n<p><span style=\"font-weight: 400\">For learning-based detection, run a proper normal period and update it when setups change. Automate simple parts but keep people checking serious cases.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Update lists often, train staff, and test the whole setup regularly. Aim for the higher levels in the official guides and explain any gaps clearly.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400\">\n<div class=\"blog_faq\">\n                <div class=\"faq\">\n            <h3 class=\"faq_title\"><span class=\"ez-toc-section\" id=\"How_do_intrusion_detection_systems_differ_from_systems_that_also_block_attacks\"><\/span>How do intrusion detection systems differ from systems that also block attacks? <i class=\"fa fa-plus\"><\/i><span class=\"ez-toc-section-end\"><\/span><\/h3> \n                        <div class=\"faq_description\">\n                <p>Intrusion detection systems only watch and warn. Prevention versions stop threats on the spot. Many tools combine both, but German rules for key sites put detection first and let prevention stay optional, so machines keep running.\r\n<\/p>\n            <\/div>\n            <\/div>\n                \n                <div class=\"faq\">\n            <h3 class=\"faq_title\"><span class=\"ez-toc-section\" id=\"Does_every_company_in_Germany_have_to_use_intrusion_detection_systems\"><\/span>Does every company in Germany have to use intrusion detection systems?  <i class=\"fa fa-plus\"><\/i><span class=\"ez-toc-section-end\"><\/span><\/h3> \n                        <div class=\"faq_description\">\n                <p>Not all, but critical infrastructure sites must since May 2023. Other important firms should, and new, wider rules will cover far more organizations soon.\r\n<\/p>\n            <\/div>\n            <\/div>\n                \n                <div class=\"faq\">\n            <h3 class=\"faq_title\"><span class=\"ez-toc-section\" id=\"Do_intrusion_detection_systems_help_meet_data_protection_rules_in_Germany\"><\/span>Do intrusion detection systems help meet data protection rules in Germany?  <i class=\"fa fa-plus\"><\/i><span class=\"ez-toc-section-end\"><\/span><\/h3> \n                        <div class=\"faq_description\">\n                <p>Yes, they let teams find and record issues fast, which supports the short reporting window. Logs also prove the company takes protection seriously.\r\n<\/p>\n            <\/div>\n            <\/div>\n                \n                <div class=\"faq\">\n            <h3 class=\"faq_title\"><span class=\"ez-toc-section\" id=\"Can_smaller_German_firms_actually_pay_for_and_run_intrusion_detection_systems\"><\/span>Can smaller German firms actually pay for and run intrusion detection systems? <i class=\"fa fa-plus\"><\/i><span class=\"ez-toc-section-end\"><\/span><\/h3> \n                        <div class=\"faq_description\">\n                <p>Options exist that scale with size. Cloud or managed services from German suppliers keep costs down. Some government help covers part of the expense for medium-sized companies.\r\n<\/p>\n            <\/div>\n            <\/div>\n                \n                <div class=\"faq\">\n            <h3 class=\"faq_title\"><span class=\"ez-toc-section\" id=\"How_well_do_intrusion_detection_systems_catch_brand-new_unknown_attacks\"><\/span>How well do intrusion detection systems catch brand-new, unknown attacks?  <i class=\"fa fa-plus\"><\/i><span class=\"ez-toc-section-end\"><\/span><\/h3> \n                        <div class=\"faq_description\">\n                <p>Versions that learn normal behavior catch these better than list-only tools. German factory systems already proved useful against fresh threats in live use.\r\n<\/p>\n            <\/div>\n            <\/div>\n            \n    \n    \n    \n    \n    \n    \n    <\/div>\n\n<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Wrapping_Up\"><\/span>Wrapping Up<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400\">Intrusion detection systems give German industry a practical way to handle today\u2019s risks. Rules make them necessary in many places, while local tools fit the exact needs of factories and power setups. Companies that put solid systems in place protect jobs, keep innovation safe, and stay ready for whatever comes next.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Take time now to check your own setup or start one. Look at the official guides, talk to local experts, and build protection that matches Germany\u2019s strong position in Europe. Good intrusion detection systems help the whole country keep moving forward securely.<\/span><\/p>\n<p><span style=\"font-weight: 400\">    \t<hr class=\"mt-5\">\n        <div class=\"custom_CTA mt-5\">\n            <div class=\"row\">\n                <div class=\"col-lg-7 align-self-center text-lg-left text-center\">\n                    <h3><span class=\"ez-toc-section\" id=\"Start_Browsing_Privately\"><\/span>Start Browsing Privately!<span class=\"ez-toc-section-end\"><\/span><\/h3>\n                    <p clas=\"mb-0\">iProVPN encrypts your data for protection against hackers and surveillance. Unblock your favorite streaming platforms instantly with the best VPN for streaming.<\/p>\n                <\/div>\n                <div class=\"col-lg-5 align-self-center text-center\">\n                    <a class=\"custom_btn_cta\" href=\"https:\/\/iprovpn.com\/buy-vpn\" title=\"Get iProVPN Now\">Get iProVPN NOW<\/a>\n                <\/div>\n            <\/div>\n    \t<\/div>\n    <\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cyber threats change fast these days. German businesses and key infrastructure operators deal with their own set of problems and rules. Car plants in Bavaria, energy grids in the Ruhr region, and factories across the country all need solid protection for data, machines, and the economy. Intrusion detection systems watch network traffic and system activities [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":19815,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[522],"tags":[],"class_list":["post-19367","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What Are Intrusion Detection Systems?<\/title>\n<meta name=\"description\" content=\"Intrusion detection systems are security tools that monitor networks and devices for suspicious activity, alerting teams to cyber threats.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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