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FortiGate Advanced Troubleshooting & Incident Engineering
Paperback
Series: The Fortinet Engineer - Troubleshooting, Book 3
General ComputersComputer Security
Publisher: Independently Published
Published: Nov 4 2026
Pages: 442
Weight: 1.68
Height: 0.90 Width: 7.00 Depth: 10.00
Language: English
Diagnose complex FortiGate incidents with evidence you can explain and recovery you can verify.
When failures cross firewall, management, cloud and application boundaries, symptoms can point in several directions. Intermittent behaviour, overlapping faults and conflicting configuration states make it difficult to establish what happened-and whether the problem is truly resolved.
FortiGate Advanced Troubleshooting & Incident Engineering by Rob Jeffery provides a structured approach to these investigations. Book 3 in The Fortinet Engineer Troubleshooting Series develops the technical judgement needed to connect evidence across systems, test competing explanations and restore services while preserving security controls.
Across 24 chapters, you will learn how to:
Reconstruct complex incidents by separating symptoms from causes, examining retained state and investigating recurring failures.
Trace application dependencies through DNS, identity, PKI, APIs and backend services.
Investigate managed environments using FortiManager state, installation history, diagnostic automation and infrastructure-as-code reconciliation.
Connect telemetry across an estate with FortiAnalyzer, SIEM data and carefully scoped evidence collection.
Follow hybrid-cloud service paths through routing, private connectivity, split DNS, reverse proxies, WAFs and CDNs.
Control repairs and verify recovery using bounded changes, canary checks and evidence that the required service works while prohibited access remains blocked.
Strengthen incident leadership through clear handoffs, reusable runbooks, service assurance, peer review and technical defence of findings.
FortiGate commands, illustrative outputs, practical exercises and independent challenges connect the investigative method to technical decisions. Capstone cases bring multiple faults and customer environments together, while a dedicated answers appendix supports self-study and review.
Written for experienced network and security engineers, MSP and MSSP teams, incident responders and technical service leaders, this book assumes familiarity with FortiGate sessions, policies, NAT and packet capture, as covered in FortiGate Troubleshooting Fundamentals or gained through equivalent practical experience.
Develop a repeatable approach to difficult incidents-and the evidence needed to explain your diagnosis, justify the repair and demonstrate durable recovery.
Published by Maverick Publishing. An independent educational publication, not affiliated with or endorsed by Fortinet.
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