it-knowledge/src/solutions/security.md

Security Solutions

This section documents my solutions to security-related scenarios, including SELinux, firewall configuration, and security hardening.

Scenario: SELinux Configuration

Original Problem

[To be filled with actual scenario]

Environment

• OS Version: RHEL/Rocky Linux
• Initial State: [Initial security configuration]
• Required Outcome: [Desired security setup]

Solution Steps

1. Check Current SELinux Status

   # Check SELinux status
   getenforce
   
   # Check SELinux contexts
   ls -Z /var/www/html
   

   [Explanation of current state]

2. Configure SELinux Policies

   # Set SELinux boolean
   setsebool -P httpd_can_network_connect on
   
   # Modify context
   semanage fcontext -a -t httpd_sys_content_t "/custom/path(/.*)?"
   

   [Explanation of configuration]

3. Apply Changes

   # Restore contexts
   restorecon -Rv /custom/path
   

   [Explanation of changes]

Verification

# Verify SELinux status
sestatus

# Check audit logs
ausearch -m AVC -ts recent

# Test functionality
curl localhost/custom/path

Key Learnings

• Understanding of SELinux concepts
• Security best practices
• Troubleshooting methodology

Skills Demonstrated

• SELinux Management
• Firewall Configuration
• Security Auditing
• System Hardening

[Additional scenarios will be documented here as completed]