Training and CyberInsights Today

F5 ASM

17 lessons · Beginner to advanced

Policies, staging, learning, signatures, tuning, API security, logs and recovery.

F5 ASM training →

FortiWeb

17 lessons · Beginner to advanced

Server policies, profiles, ML, signatures, APIs, troubleshooting and HA.

FortiWeb training →

How to use the WAF training hub

CyberInsights Today

Daily cybersecurity analysis and practical bulletins

Understand recent vulnerabilities, threats, their impact and mitigation. When there is no worthwhile new issue, learn a security concept or defensive practice through clear explanations, illustrations and evidence.

Read CyberInsights Today →

FortiWeb Lesson 11: Attack Logs and Evidence-Based Troubleshooting

FORTIWEB CLASSROOM • LESSON 11

Level: Intermediate · Study and lab: 60 minutes
Instructor: Harpreet Singh Virdi, CISSP, CCSP

FortiWeb course guide · FortiWeb training block

Investigate one request at a time

A user reports that checkout failed. Before editing security settings, determine whether FortiWeb, the application, or another component rejected the request. A status code and a screenshot are useful starting points, but they do not identify the cause.

Know the log families

Attack logs describe security detections. Traffic logs help explain requests and responses when enabled. Event logs describe system or administrative activity. Storage, severity filters, destinations, and feature settings determine what is available. An empty view does not prove a request was allowed.

Read an attack event in order

  1. Confirm time, timezone, device, hostname, URL, method, and server policy.
  2. Read the action actually taken.
  3. Identify the attack type, rule, signature ID, or constraint involved.
  4. Inspect the matched input location and available sanitized context.
  5. Correlate with client behavior, traffic records, and origin logs.

Payload capture can expose tokens, cookies, passwords, and submitted data. Enable only the retention needed for the investigation, use the available sensitivity controls, and restrict access. Captured payloads can also be truncated; absence of bytes from a captured fragment is not proof they were absent from the request.

Guided lab

  1. Verify that lab logging is enabled and the intended destination is functioning.
  2. Send a normal request and a deterministic request triggering your test access rule.
  3. Record the timestamp and application path using synthetic values.
  4. Open the attack-log viewer and filter to the relevant time, policy, and URL.
  5. Explain the match and response in two sentences.
  6. Generate a harmless application-originated error and compare its evidence with the FortiWeb-generated response.
  7. Remove unnecessary packet capture and confirm the planned logging configuration remains.

Expected result: you can attribute the two failures correctly and state what the logs do not establish. If no event appears, check traffic selection, logging status, filters, retention, destination health, and clock alignment.

Use dashboards carefully

Summaries help find repeated patterns, but counts alone do not diagnose an individual request. Drill into the event. FortiView analysis can help group matching characteristics for tuning; review the actual requests and requirements before accepting an exception.

Knowledge check

A request has a high severity label. Does that prove successful exploitation?

Instructor answer

No. Severity helps prioritize investigation. Establish the match, action, application vulnerability, and outcome with supporting evidence.

Official reading

Independent training, not affiliated with Fortinet. Examples use an authorized isolated lab with synthetic data. The lab steps and expected outcomes have not been executed on a FortiWeb appliance for this publication. Firmware, platform, operating mode, licensing, and subscriptions affect behavior; follow the documentation for your exact build. References use 8.0.x examples and do not constitute an upgrade recommendation.

← Previous FortiWeb lesson · FortiWeb course guide · Next FortiWeb lesson →

Comments

Post a Comment

Popular posts from this blog

PHP2Shell Explained: Impact, Patches and Mitigation for CVE-2026-109618 and CVE-2026-109619

By Harpreet Singh Virdi, CISSP, CCSP · Cybersecurity Updates Published and evidence checked: November 3, 2026. If you run PHP, start with an inventory and a patch decision today. If a security appliance uses PHP internally, check its vendor advisory too. Updating your website code alone does not update the runtime inside a firewall. PHP2Shell is the name used for CVE-2026-109618 and CVE-2026-109619. They can allow remote code execution without authentication. PHP released security updates on October 21. The PHP team identifies web-serving installations as at risk and highlights Apache mod_php as the highest-risk configuration. PHP security announcements .
Read more

Start Here: F5 ASM Classroom — From Beginner to Advanced

WELCOME TO YOUR ONLINE CLASSROOM Learn F5 ASM, one clear lesson at a time. A practical English-language course for beginners, progressing to advanced policy operations. Instructor: Harpreet Singh Virdi, CISSP, CCSP Start here — you do not need prior ASM experience If the words “security policy,” “staging,” and “learning suggestion” feel unfamiliar, you are in the right place. We will explain them carefully, follow a web request through BIG-IP, and build a policy around a fictional online bookshop. F5 ASM means BIG-IP Application Security Manager. It inspects application traffic against configured security checks. The course explains how to use those checks, investigate their results, and protect legitimate user journeys. Advanced WAF terminology also appears; feature availability depends on your release and license. How to take this course Read the lessons in numerical order. Each is a separate blog post. Learn the terms, then work through the example before changing settings. Use an ...
Read more

Lesson 01: What Is F5 ASM? Your First Web Application Firewall Class

F5 ASM CLASSROOM • LESSON 01 Level: Beginner  |  Suggested study and lab time: 30 minutes Instructor: Harpreet Singh Virdi, CISSP, CCSP Start Here / Course Guide · All lessons Welcome to class Imagine running an online bookshop. Your website must accept searches, logins, and orders from people you have never met. The same public entrance also receives malformed requests and attempts to exploit software weaknesses. How do you distinguish a normal search from a suspicious request? A web application firewall (WAF) examines web traffic using rules about the application and patterns associated with attacks. F5 BIG-IP Application Security Manager, usually called ASM , is a WAF capability on the BIG-IP platform. Our task is to understand the traffic, define appropriate checks, investigate the results, and enforce protection without unnecessarily disrupting legitimate users. What you will learn Explain the purpose of a WAF in your own words. Identify where ASM fits in a web reque...
Read more