Firewalls

  1. Troubleshooting and Diagnostics
    1. Common Firewall Issues
      1. Connectivity Problems
        1. Rule Misconfigurations
          1. NAT Issues
            1. Routing Problems
            2. Performance Issues
              1. Resource Exhaustion
                1. Connection Limits
                  1. Processing Bottlenecks
                  2. Security Issues
                    1. Policy Violations
                      1. Attack Detection
                        1. False Positives
                      2. Diagnostic Tools and Techniques
                        1. Built-in Diagnostic Tools
                          1. Packet Capture
                            1. Connection Monitoring
                              1. Performance Counters
                              2. External Diagnostic Tools
                                1. Network Analyzers
                                  1. Port Scanners
                                    1. Vulnerability Scanners
                                    2. Log Analysis Techniques
                                      1. Pattern Matching
                                        1. Timeline Analysis
                                          1. Correlation Methods
                                        2. Troubleshooting Methodologies
                                          1. Systematic Approach
                                            1. Problem Identification
                                              1. Root Cause Analysis
                                                1. Solution Implementation
                                                2. Documentation and Reporting
                                                  1. Issue Tracking
                                                    1. Resolution Documentation
                                                      1. Knowledge Base Maintenance

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                                                  9. Firewall Evasion Techniques and Countermeasures

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                                                  11. Compliance and Regulatory Considerations