NSE4 Security Profiles Practice Question
A network administrator wants to prevent users from accessing known malicious websites using FortiGate. Which security profile should be applied to the firewall policy to achieve this goal?
⚠ Common exam trap
Many exam-takers confuse web filtering with application control or IPS, mistakenly thinking that blocking malicious websites requires signature-based detection or application-layer control, rather than URL reputation-based filtering.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Web filtering profile
Web filtering profile. FortiGate's web filtering profile uses URL rating and category-based filtering to block access to known malicious websites by leveraging FortiGuard's real-time threat intelligence. This is the specific security profile designed to control web access based on URL reputation, including blocking malicious URLs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Antivirus profile
Why it's wrong here
Antivirus profiles are designed to scan file transfers and email attachments for malicious code using FortiGuard AV signatures. Even if a user visits a suspicious website, the AV profile can only quarantine or block the downloaded file, not the initial connection to the site. Because it lacks URL category awareness, it cannot differentiate a gambling site from a news site, so it cannot enforce web browsing restrictions.
- ✗
Application control profile
Why it's wrong here
Application control profiles inspect traffic to identify and manage applications, such as social media platforms or streaming services, based on their network signatures. While they can block specific app sessions, they do not evaluate the web category of every accessed URL; a site like 'gambling.com' might not be recognized as a distinct application. Therefore, an application control profile is meant for app-level granularity, not for blocking entire website categories.
- ✗
IPS profile
Why it's wrong here
An IPS profile uses a database of vulnerability and exploit signatures to detect and prevent malicious network activity, such as SQL injection or buffer overflows. It inspects packet content and flow patterns, but it does not query FortiGuard's web categorization engine to determine if a URL belongs to a banned category. Consequently, it might block one malicious page, but it cannot prevent users from accessing all sites within a prohibited category.
- ✓
Web filtering profile
Why this is correct
A web filtering profile is purpose-built to control web access by evaluating each requested URL against FortiGuard's real-time web category database, which includes categories like gambling, adult, and malicious sites. It can block or allow entire categories, apply URL or DNS filtering, and log or warn users based on policy. This is the exact tool to prevent users from accessing inappropriate content, as it can be assigned to a firewall policy to filter both HTTP and HTTPS traffic.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This NSE4 practice question is part of Courseiva's free Fortinet certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the NSE4 exam.