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      RHEL SELinux Policy Administration

      babsimLIVE Delivery

      This advanced security course takes a deep dive into the complexities and nuances of SELinux. The course discusses security threats posed to today’s computing resources and mitigating them through network and host protections. Students will review SELinux technology through understanding SELinux’s goals, how it has evolved including its features and limitations.


      Students will gain hands-on experience in working with SELinux modes, virtualization, and container security. The core of the course is learning and understanding SELinux policy through, choosing, managing, and studying policy examples. Once students have an understanding of the SELinux policy the course will cover writing policy modules. The course is capped with multiple discussions on case studies that explore building SELinux policies. This SELinux course covers one of the major challenge faced by administering SELinux, SELinux troubleshooting.


      Supported Distributions:Red Hat Enterprise Linux 7

      Course Outline

      1. COMPUTING SECURITY & SELINUX OVERVIEW
        1. Security Threats
        2. Network and Host Protection
        3. Shortcomings of Traditional Unix Security
        4. DAC vs. MAC
        5. SELinux Goals
        6. SELinux Evolution
        7. SELinux Features and Limitations
        8. SELinux Contexts
        9. Labels
        10. Access Decisions
        11. Transition Decisions: Processes
        12. SELinux Example
        LAB TASKS
        1. System Preparation
        2. Contexts
      2. WORKING WITH SELINUX
        1. SELinux Modes
        2. Gathering SELinux Information
        3. SELinux Virtual Filesystem
        4. Core Commands and SELinux
        5. SELinux Management Utilities
        6. Context and File Operations
        7. Managing File Context Database
        8. Managing Contexts
        9. Booleans
        10. SELinux Mount Options
        11. Virtualization Security
        12. Container Security
        13. Securing Networked Services
        14. Managing Port Contexts
        LAB TASKS
        1. Exploring SELinux Modes
        2. Gathering Information
        3. Managing SELinux Booleans
        4. Managing Contexts
        5. Mounting Filesystems
        6. Manual Relabel
        7. GUI Utilities
      3. POLICIES
        1. The SELinux Policy
        2. Choosing an SELinux Policy
        3. Policy Layout
        4. Examining Policy
        5. Managing Policies
        6. Targeted Policy
        7. Targeted Policy Example: Apache
        8. Targeted Policy Example: Other Contexts
        9. Minimum Policy
        10. MLS Policy Overview
        11. MCS Translation
        12. Polyinstantiated Directories
      4. USERS & ROLES
        1. Overview of Roles
        2. Roles
        3. User Mappings
        4. Kiosk User (xguest)
        5. Controlling Application Execution
        LAB TASKS
        1. SELinux Identities and Roles
        2. Kiosk User
      5. TROUBLESHOOTING SELINUX
        1. Access Denied. Now what?
        2. AVC Denied Examples
        3. Incorrect File Context
        4. Permissive Domains
        5. Using audit2allow
        LAB TASKS
        1. Troubleshooting using Permissive Domains
        2. Using audit2why and audit2allow to create policy
      6. WRITING POLICY MODULES
        1. SELinux Policy Tools
        2. SELinux Policy Source
        3. Reference Policy Source Exploration
        4. Process Transitions
        5. Object classes
        6. Policy Macros
        7. Creating Booleans
        8. Using Booleans in Policies
        9. Other Policy Commands
        10. Writing Policy Modules
        LAB TASKS
        1. Domain Transition Exploration
        2. Exploring SELinux Modes
        3. Writing a Simple Module
        4. Defining and using booleans
        5. Creating & Compiling Policy from Source
        6. Using seplogen
      7. CASE STUDY: SECURING AN APPLICATION LAB TASKS
        1. SELinux Policy Building: Case Study 1
      8. CASE STUDY: SECURING AN APPLICATION LAB TASKS
        1. SELinux Policy Building: Case Study 2
      9. BONUS LABS: LAB TASKS
        1. Installing and Switching Policies
        2. Minimum policy
        3. MCS Exploration
        4. MCS Restrictions
        5. Polyinstantiated Directories

      Audience

      Knowledge equivalent to the SL-120: Linux Fundamentals and SL-250: Enterprise Linux Systems Administration

      Available Course Dates

      03/09/2021 10:00 am - 03/11/2021 6:00 pm babsimLive Delivery
      08/10/2021 10:00 am - 08/12/2021 6:00 pm babsimLive Delivery
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