{"id":168,"date":"2025-11-30T21:27:21","date_gmt":"2025-11-30T21:27:21","guid":{"rendered":"https:\/\/adler-tech.com\/?page_id=168"},"modified":"2026-04-13T14:25:52","modified_gmt":"2026-04-13T13:25:52","slug":"linux-system-security-hardening-auditing","status":"publish","type":"page","link":"https:\/\/adler-tech.com\/?page_id=168","title":{"rendered":"Linux System Security: Hardening, Auditing"},"content":{"rendered":"\n

Duration:<\/strong> 3 Days Focus:<\/strong> Practical implementation of advanced defensive and auditing mechanisms in Linux environments.<\/p>\n\n\n\n

\n\n\n\n

Day 1: System Hardening and Access Control \ud83d\udee1\ufe0f<\/h2>\n\n\n\n

Module 1: System Hardening and Physical Controls<\/h3>\n\n\n\n
    \n
  • Authentication and Authorization<\/strong> (Configuration of authentication and authorization methods, including PAM and SSH).<\/li>\n\n\n\n
  • Network Perimeter<\/strong> (Advanced firewall configuration<\/strong>\u2014implementing iptables<\/code>\/nftables<\/code> or firewalld<\/code>).<\/li>\n\n\n\n
  • Disk Encryption<\/strong> (Implementing disk encryption<\/strong> (LUKS\/dm-crypt)).<\/li>\n\n\n\n
  • Physical Security<\/strong> (Controlling USB memory<\/strong> and external media access).<\/li>\n\n\n\n
  • Secure Boot<\/strong> (Implementing system boot security<\/strong> mechanisms (e.g., GRUB password, Secure Boot)).<\/li>\n<\/ul>\n\n\n\n

    Module 2: Mandatory Access Control (MAC)<\/h3>\n\n\n\n
      \n
    • SELinux Introduction<\/strong> (Understanding SELinux<\/strong> operation as a Mandatory Access Control system).<\/li>\n\n\n\n
    • State Management<\/strong> (Switching states (Enforcing\/Permissive\/Disabled) and managing modes).<\/li>\n\n\n\n
    • Policies and Contexts<\/strong> (Managing SELinux contexts and policies<\/strong> for services).<\/li>\n<\/ul>\n\n\n\n

      Module 3: Securing and Centralizing System Logs<\/h3>\n\n\n\n
        \n
      • Logging Services<\/strong> (Proper configuration of logging services (rsyslog<\/code> or systemd-journald<\/code>)).<\/li>\n\n\n\n
      • Log Protection<\/strong> (Securing system logs<\/strong>\u2014access control, permissions).<\/li>\n\n\n\n
      • Centralized Logging<\/strong> (Implementing central event logging<\/strong> for correlation and security).<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        Day 2: Auditing, Monitoring, and Threat Detection \ud83d\udd0d<\/h2>\n\n\n\n

        Module 4: File Integrity Monitoring (FIM)<\/h3>\n\n\n\n
          \n
        • Integrity Control<\/strong> (Implementing file integrity monitoring<\/strong> mechanisms (e.g., AIDE, Tripwire)).<\/li>\n\n\n\n
        • Change Detection<\/strong> (Configuration and analysis of checksum databases to detect unauthorized modifications).<\/li>\n<\/ul>\n\n\n\n

          Module 5: Real-time System Auditing<\/h3>\n\n\n\n
            \n
          • Auditd Implementation<\/strong> (Configuration and use of the Auditd<\/strong> tool to track user and system activity).<\/li>\n\n\n\n
          • Rule Creation<\/strong> (Defining rules for monitoring access to critical files, command execution, and configuration changes).<\/li>\n\n\n\n
          • Event Analysis<\/strong> (Processing and analyzing Auditd logs<\/strong>).<\/li>\n<\/ul>\n\n\n\n

            Module 6: Malware Detection<\/h3>\n\n\n\n
              \n
            • System Scanning<\/strong> (Searching for rootkits, Trojans, etc.<\/strong> using tools like chkrootkit<\/code> and rkhunter<\/code>).<\/li>\n\n\n\n
            • Operating Methods<\/strong> (Understanding how kernel and user-space rootkits function and hide).<\/li>\n<\/ul>\n\n\n\n

              Module 7: Vulnerability Scanning<\/h3>\n\n\n\n
                \n
              • Local Scanning<\/strong> (Scanning the system for vulnerabilities<\/strong> using local tools (e.g., lynis<\/code>, openvas<\/code> client)).<\/li>\n\n\n\n
              • Risk Assessment<\/strong> (Analyzing reports and prioritizing security patches).<\/li>\n<\/ul>\n\n\n\n
                \n\n\n\n

                Day 3: Attacker’s Perspective and Countermeasures \ud83d\udc80<\/h2>\n\n\n\n

                Module 8: Cryptography and Data Security<\/h3>\n\n\n\n
                  \n
                • Cryptography Basics<\/strong> (Discussion of key elements of cryptography<\/strong>\u2014symmetric, asymmetric ciphers, hashing).<\/li>\n\n\n\n
                • Practical Applications<\/strong> (Using GPG\/OpenSSL for file encryption and signing).<\/li>\n<\/ul>\n\n\n\n

                  Module 9: Hacker’s View: Scanning and Reconnaissance<\/h3>\n\n\n\n
                    \n
                  • Remote Reconnaissance<\/strong> (Scanning the system for vulnerabilities<\/strong> from an external perspective (e.g., nmap<\/code>, port scanning)).<\/li>\n\n\n\n
                  • Analysis<\/strong> (Interpreting scan results and identifying open services).<\/li>\n<\/ul>\n\n\n\n

                    Module 10: Network Attacks and Defense<\/h3>\n\n\n\n
                      \n
                    • Sniffing<\/strong> (Principles of Sniffing<\/strong> (traffic eavesdropping) and detection methods).<\/li>\n\n\n\n
                    • Defense Methods<\/strong> (Implementing network-level countermeasures (e.g., static ARP entries) and using encryption (SSL\/TLS, SSH) as a defense against sniffing).<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

                      Duration: 3 Days Focus: Practical implementation of advanced defensive and auditing mechanisms in Linux environments. Day 1: System Hardening and Access Control \ud83d\udee1\ufe0f Module 1: System Hardening and Physical Controls Module 2: Mandatory Access Control (MAC) Module 3: Securing and Centralizing System Logs Day 2: Auditing, Monitoring, and Threat Detection \ud83d\udd0d Module 4: File Integrity […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":11,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-168","page","type-page","status-publish","hentry"],"yoast_head":"\nLinux System Security: Hardening, Auditing - ADLER-TECH<\/title>\n<meta name=\"description\" content=\"We'll help you to protect your systems from hackers or botnets. Linux provides many tools for protection, including SElinux auditd and more\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/adler-tech.com\/?page_id=168\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux System Security: Hardening, Auditing - ADLER-TECH\" \/>\n<meta property=\"og:description\" content=\"We'll help you to protect your systems from hackers or botnets. Linux provides many tools for protection, including SElinux auditd and more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/adler-tech.com\/?page_id=168\" \/>\n<meta property=\"og:site_name\" content=\"ADLER-TECH\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-13T13:25:52+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/adler-tech.com\\\/?page_id=168\",\"url\":\"https:\\\/\\\/adler-tech.com\\\/?page_id=168\",\"name\":\"Linux System Security: Hardening, Auditing - ADLER-TECH\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/adler-tech.com\\\/#website\"},\"datePublished\":\"2025-11-30T21:27:21+00:00\",\"dateModified\":\"2026-04-13T13:25:52+00:00\",\"description\":\"We'll help you to protect your systems from hackers or botnets. Linux provides many tools for protection, including SElinux auditd and more\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/adler-tech.com\\\/?page_id=168#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/adler-tech.com\\\/?page_id=168\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/adler-tech.com\\\/?page_id=168#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/adler-tech.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Trainings\",\"item\":\"https:\\\/\\\/adler-tech.com\\\/?page_id=7\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Linux training\",\"item\":\"https:\\\/\\\/adler-tech.com\\\/?page_id=11\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Linux System Security: Hardening, Auditing\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/adler-tech.com\\\/#website\",\"url\":\"https:\\\/\\\/adler-tech.com\\\/\",\"name\":\"ADLER-TECH\",\"description\":\"Best IT trainings, support and bodyleasing\",\"publisher\":{\"@id\":\"https:\\\/\\\/adler-tech.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/adler-tech.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/adler-tech.com\\\/#organization\",\"name\":\"ADLER-TECH\",\"url\":\"https:\\\/\\\/adler-tech.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/adler-tech.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/adler-tech.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/ADLER-TECH_LOGO.png\",\"contentUrl\":\"https:\\\/\\\/adler-tech.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/ADLER-TECH_LOGO.png\",\"width\":361,\"height\":121,\"caption\":\"ADLER-TECH\"},\"image\":{\"@id\":\"https:\\\/\\\/adler-tech.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.linkedin.com\\\/company\\\/110643968\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Linux System Security: Hardening, Auditing - ADLER-TECH","description":"We'll help you to protect your systems from hackers or botnets. Linux provides many tools for protection, including SElinux auditd and more","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/adler-tech.com\/?page_id=168","og_locale":"en_US","og_type":"article","og_title":"Linux System Security: Hardening, Auditing - ADLER-TECH","og_description":"We'll help you to protect your systems from hackers or botnets. Linux provides many tools for protection, including SElinux auditd and more","og_url":"https:\/\/adler-tech.com\/?page_id=168","og_site_name":"ADLER-TECH","article_modified_time":"2026-04-13T13:25:52+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/adler-tech.com\/?page_id=168","url":"https:\/\/adler-tech.com\/?page_id=168","name":"Linux System Security: Hardening, Auditing - ADLER-TECH","isPartOf":{"@id":"https:\/\/adler-tech.com\/#website"},"datePublished":"2025-11-30T21:27:21+00:00","dateModified":"2026-04-13T13:25:52+00:00","description":"We'll help you to protect your systems from hackers or botnets. Linux provides many tools for protection, including SElinux auditd and more","breadcrumb":{"@id":"https:\/\/adler-tech.com\/?page_id=168#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/adler-tech.com\/?page_id=168"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/adler-tech.com\/?page_id=168#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/adler-tech.com\/"},{"@type":"ListItem","position":2,"name":"Trainings","item":"https:\/\/adler-tech.com\/?page_id=7"},{"@type":"ListItem","position":3,"name":"Linux training","item":"https:\/\/adler-tech.com\/?page_id=11"},{"@type":"ListItem","position":4,"name":"Linux System Security: Hardening, Auditing"}]},{"@type":"WebSite","@id":"https:\/\/adler-tech.com\/#website","url":"https:\/\/adler-tech.com\/","name":"ADLER-TECH","description":"Best IT trainings, support and bodyleasing","publisher":{"@id":"https:\/\/adler-tech.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/adler-tech.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/adler-tech.com\/#organization","name":"ADLER-TECH","url":"https:\/\/adler-tech.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/adler-tech.com\/#\/schema\/logo\/image\/","url":"https:\/\/adler-tech.com\/wp-content\/uploads\/2026\/04\/ADLER-TECH_LOGO.png","contentUrl":"https:\/\/adler-tech.com\/wp-content\/uploads\/2026\/04\/ADLER-TECH_LOGO.png","width":361,"height":121,"caption":"ADLER-TECH"},"image":{"@id":"https:\/\/adler-tech.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.linkedin.com\/company\/110643968"]}]}},"_links":{"self":[{"href":"https:\/\/adler-tech.com\/index.php?rest_route=\/wp\/v2\/pages\/168","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/adler-tech.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/adler-tech.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/adler-tech.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/adler-tech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=168"}],"version-history":[{"count":1,"href":"https:\/\/adler-tech.com\/index.php?rest_route=\/wp\/v2\/pages\/168\/revisions"}],"predecessor-version":[{"id":169,"href":"https:\/\/adler-tech.com\/index.php?rest_route=\/wp\/v2\/pages\/168\/revisions\/169"}],"up":[{"embeddable":true,"href":"https:\/\/adler-tech.com\/index.php?rest_route=\/wp\/v2\/pages\/11"}],"wp:attachment":[{"href":"https:\/\/adler-tech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}