NSE4 · domain
Security Profiles
Practise Fortinet NSE 4 Network Security Professional NSE4 Security Profiles practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.
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What to know about Security Profiles
Security Profiles questions test whether you can apply the concept in context, not just recognise a definition.
How the topic appears in realistic exam-style scenarios.
Which detail in the question changes the correct answer.
How to eliminate plausible but wrong options.
How to connect the question back to the wider exam objective.
Watch out for
Common Security Profiles exam traps
- ▸Answering from memory before reading the full scenario.
- ▸Missing a constraint such as cost, availability, security, scope or command context.
- ▸Choosing a broad answer when the question asks for the most specific fix.
- ▸Ignoring why the wrong options are tempting.
Question index
All Security Profiles questions (65)
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An administrator configures a DLP profile to detect credit card numbers in email traffic. The DLP rule uses a regular expression. However, the DLP sensor is not triggering on emails containing credit card numbers. What is a likely reason?
Hard2A FortiGate configured with IPS anomaly detection is generating false positives for the 'tcp_syn_flood' anomaly. The administrator wants to reduce the false positives without completely disabling the detection. Which action should the administrator take?
Hard3An administrator wants to prevent data leakage by blocking outbound emails that contain credit card numbers. Which security profile should be configured?
Medium4A FortiGate administrator configures an email filter profile to block spam. Users report that some legitimate emails are being blocked. The administrator wants to reduce false positives while still blocking spam. What should the administrator do?
Medium5A FortiGate is configured with flow-based inspection and an IPS profile. The administrator runs 'diagnose ips session list' and sees many sessions with 'state=bypass'. What does this indicate?
Hard6A FortiGate administrator has configured an Application Control profile to block 'P2P' applications. However, users are still able to use BitTorrent. What is the MOST likely reason?
Medium7A FortiGate administrator is configuring a data leak prevention (DLP) profile to prevent the leakage of social security numbers (SSNs) via email. Which TWO settings must be configured in the DLP profile?
Hard8An administrator configured a DLP profile to detect credit card numbers in outgoing emails. The profile is applied to an outbound SMTP policy. Users report that emails with credit card numbers are still being sent successfully. What is the most likely cause?
Medium9A FortiGate administrator has configured a firewall policy with SSL deep inspection using a forward trust CA certificate. When users access an HTTPS website with a valid certificate, they still receive a certificate warning. What is the MOST likely reason?
Medium10A FortiGate administrator is troubleshooting an issue where users cannot access a legitimate website that is categorized as 'Pornography' by FortiGuard. The web filter profile is configured to block that category. The administrator wants to allow access for a specific user group without modifying the global web filter profile. What is the BEST approach?
Hard11An administrator receives reports that some internal users can access Facebook despite a web filtering profile that blocks the 'Social Networking' category. The policy is configured with deep inspection. Which THREE checks should the administrator perform to troubleshoot this issue?
Hard12A FortiGate administrator runs the following command and sees: 'diagnose ips anomaly list' returns no entries, but the IPS sensor is configured with anomaly signatures. What is the MOST likely reason the signatures are not appearing?
Hard13A company is deploying FortiGate for outbound web filtering. They want to block users from accessing social media sites during business hours, but still allow access to cloud-based productivity tools like Office 365. Which approach should the administrator use to meet this requirement?
Medium14Which web filtering feature allows an administrator to force web search engines to filter explicit content in search results, regardless of the user's browser settings?
Easy15What is the purpose of the DNS filter security profile on a FortiGate?
Easy16A network administrator notices that some users can access blocked web categories despite a web filter profile applied to the policy. The admin runs 'diagnose debug rating' and sees 'rating not allow' for the category. What is the MOST likely cause?
Medium17You run 'diagnose sys session filter dport 443' and see the following output: proto=6 proto_state=01 duration=3600 expire=3599 What does this indicate?
Hard18Which inspection mode in the antivirus profile processes traffic by buffering the entire file before scanning, allowing more thorough detection but potentially increasing latency?
Easy19A company wants to block all peer-to-peer (P2P) traffic using Application Control on their FortiGate. They have enabled the application control profile, but users can still download files via BitTorrent. What is the most likely reason?
Medium20A FortiGate administrator is configuring SSL deep inspection for a firewall policy that handles traffic to multiple internal servers. Some servers have self-signed certificates. The administrator wants to avoid certificate errors for users. What configuration is recommended?
Medium21An administrator has configured DLP sensors to detect credit card numbers in outgoing traffic. However, the administrator notices that traffic containing credit card numbers is still passing through undetected. The firewall policy uses flow-based inspection. What is the MOST likely reason DLP is not detecting the data?
Hard22A FortiGate administrator configures an IPS sensor with a signature that has a 'pass' action. The sensor is applied to a firewall policy. When traffic matches this signature, what will happen?
Medium23An administrator sees the following CLI output when checking an IPS sensor: 'config ips sensor edit test config entries edit 1 set severity medium set action block set target default end'. However, attacks with severity medium are still passing. The IPS sensor is applied to a policy with flow-based inspection. What is the likely issue?
Hard24An administrator wants to block users from uploading sensitive documents through webmail. Which security profile should be configured on the FortiGate to achieve this goal?
Medium25A company with 500 employees uses FortiGate as their internet gateway. They recently enabled SSL deep inspection using the built-in CA certificate. After deployment, many users report that they cannot access their online banking websites. The error message in the browser says 'The certificate is not trusted'. The administrator has already pushed the FortiGate CA certificate to all domain-joined computers via Group Policy. However, the problem persists for banking sites. The administrator also notices that banking sites load fine on mobile devices that do not have the CA certificate installed. What is the most likely cause and solution?
Hard26An administrator has configured an IPS sensor to block critical-severity attacks. However, after a week, they notice that a known exploit (CVE-2021-44228) is still getting through. Which configuration change should be made to improve detection?
Hard27An administrator wants to block an application named 'Skype' on the network. They create an application control profile and add a rule to block 'Skype'. However, after applying the profile to the policy, users can still use Skype. What is the most likely reason?
Medium28A FortiGate administrator wants to block spam emails sent to the company's mail server. The mail server is behind the FortiGate. Which THREE configurations should be applied?
Medium29A FortiGate administrator configures SSL deep inspection on a policy using a self-signed CA certificate. Users report that they see a certificate warning in their browsers when accessing HTTPS sites. What is the most effective solution to eliminate these warnings?
Hard30A company is implementing SSL/TLS inspection on a FortiGate to monitor encrypted traffic. They want to ensure that traffic to high-risk categories is blocked, while traffic to financial sites is inspected but not blocked. The administrator creates an SSL inspection profile that deep-inspects all traffic except traffic to financial sites. However, users report that they cannot access financial websites. What is the most likely cause?
Hard31A network administrator wants to prevent users from downloading files with .exe extensions via HTTP and HTTPS. Which security profile feature should be used?
Easy32An administrator has configured an IPS profile with an anomaly detection sensor for 'tcp_syn_flood'. After applying the profile to a firewall policy, users report intermittent connectivity issues. The administrator runs 'diagnose ips anomaly list' and sees entries for 'tcp_syn_flood' with action 'pass'. What is the MOST likely cause of the connectivity issues?
Hard33A FortiGate in flow-based mode is configured with an antivirus profile to block infected files. A user downloads a .zip file containing a known virus, but the download is allowed and the file is not quarantined. What is the MOST likely reason?
Hard34A network admin wants to block all traffic from the BitTorrent application. The admin has enabled application control on the firewall policy. Which step is necessary to achieve this?
Medium35An administrator runs the following CLI command and sees the output: 'diagnose sys session list | grep -A 5 10.1.1.100' and finds a session with 'proto=6 proto_state=01 duration=3600 expire=3599'. What does this indicate about the session?
Medium36An administrator runs 'diagnose ips anomaly list' and sees the following output: List of anomaly events: ID: 1, Type: tcp_syn_flood, Status: triggered, Count: 1500, Threshold: 1000 What does this indicate?
Hard37A 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?
Easy38A FortiGate admin notices that HTTPS traffic to a web server is not being scanned by the antivirus profile applied to the firewall policy. The admin confirms the policy is correct and antivirus is enabled. What is the MOST likely reason the traffic is not being scanned?
Medium39A FortiGate administrator receives reports that users cannot access a legitimate website that uses HTTPS. The web filtering profile is configured with strict FortiGuard categories and 'monitor all' for unknown sites. The firewall policy has an SSL/SSH inspection profile set to 'deep-inspection'. What is the most likely cause of the issue?
Hard40A FortiGate is configured with SSL deep inspection using a self-signed CA certificate. Users report that they see a certificate warning in their browser when accessing HTTPS sites. The admin wants to eliminate these warnings. What should the admin do?
Hard41A FortiGate administrator is troubleshooting an issue where users cannot access an internal HTTPS server (10.10.10.10:443) after enabling SSL deep inspection. The administrator sees that the server's certificate is self-signed. Which TWO actions should the administrator take to allow access while maintaining inspection?
Hard42An administrator configures an application control profile to block 'Facebook' and 'Twitter' using application signatures. Users can still access Facebook via HTTPS. The firewall policy has application control enabled and SSL deep inspection is not configured. Why is Facebook not blocked?
Hard43An administrator integrates FortiGate with FortiSandbox for advanced threat detection. The FortiGate is configured to send files to FortiSandbox for analysis. Despite correct configuration, files are not being submitted. The administrator runs 'diagnose debug application fortisandbox -1' and sees 'no server configured'. What is the issue?
Hard44A FortiGate administrator needs to ensure that all outbound DNS queries from internal clients are inspected for malicious domains. The administrator has a DNS filter profile configured. What additional configuration is required on the firewall policy to make the DNS filter effective?
Medium45Which TWO web filtering features can be used to block access to malicious websites? (Choose two.)
Medium46Which THREE of the following are valid methods to exclude certain HTTPS traffic from SSL inspection on a FortiGate?
Hard47An administrator configures SSL deep inspection with a CA certificate. Users accessing an internal site (internal.company.com) receive a certificate error. The administrator wants to avoid the error without disabling deep inspection. What should be done?
Hard48An administrator has configured the policy shown in the exhibit. Traffic to the web server at 10.0.1.10 over HTTPS is allowed, but users complain that they cannot access the web server's login page. The IPS sensor 'High_Security_Sensor' has a signature that blocks SQL injection attempts. The application list 'Block_Social_Media' blocks Facebook and Twitter. What is the most likely cause of the issue?
Medium49A network administrator notices that traffic from a specific internal host is not being inspected by the application control profile applied to the firewall policy. The policy is configured with proxy-based inspection and the application control profile includes a rule to block 'Facebook'. The administrator confirms the host can still access Facebook. What is the MOST likely cause?
Medium50A FortiGate administrator receives reports that some users are receiving spam emails despite an email filter profile being applied to the SMTP traffic. The email filter profile has 'spam' action set to 'discard'. What is the most likely reason spam is still reaching users?
Medium51An administrator notices that a specific application (e.g., Skype) is not being detected by the application control profile. The profile includes the 'Skype' application signature but traffic is passing through without being logged as Skype. What is the most likely reason?
Hard52What is the difference between 'certificate inspection' and 'full SSL deep inspection' on a FortiGate?
Easy53An administrator configures a web filter profile with FortiGuard category blocking and URL filter to allow example.com. Users report that example.com is still blocked. What is the most likely cause?
Medium54A network administrator notices that an IPS sensor is generating excessive false positives for a specific signature. The administrator wants to exclude traffic from a trusted internal server (IP 10.1.1.100) from inspection for that signature only, while keeping other signatures active. Which configuration change should the administrator apply?
Medium55An administrator wants to inspect SSL traffic to a specific finance application that uses a custom port (9443) and a self-signed certificate. Which configuration is required?
Hard56An organization wants to implement data leak prevention (DLP) to detect when credit card numbers are sent via email (SMTP) and webmail (HTTPS). The FortiGate is using proxy-based inspection. Which THREE configurations are necessary? (Choose three.)
Medium57A FortiGate is configured with SSL deep inspection using a locally generated CA certificate. A user reports that they cannot access https://www.example.com and receive a certificate error. The administrator checks the firewall policy and sees that the SSL inspection profile is set to 'certificate-inspection' instead of 'deep-inspection'. What is the MOST likely effect?
Hard58An administrator runs the CLI command 'diagnose debug rating' and sees that all FortiGuard web filter requests are timing out. What is the most likely cause?
Medium59What is the difference between certificate inspection and full SSL deep inspection on a FortiGate?
Easy60An administrator wants to block users from uploading files to cloud storage services like Google Drive via HTTPS. Which security profile combination is required?
Hard61A FortiGate is configured with flow-based antivirus and an IPS profile on a policy. The administrator runs 'diagnose ips packet-list' and sees that packets are being forwarded without inspection. What is the most likely reason?
Hard62A FortiGate is configured for SSL deep inspection using a CA certificate. Users report that some websites show certificate errors. The administrator wants to allow these sites without inspection. Which setting should be used?
Medium63What is the function of an IPS 'protocol decoder'?
Easy64A network administrator notices that HTTP traffic to a specific website is being blocked by the web filter profile, but the website is categorized as 'General – Personal' in FortiGuard, which is allowed. What could cause this block?
Medium65What is the primary difference between flow-based and proxy-based Antivirus inspection on a FortiGate?
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Frequently asked questions
- What does the Security Profiles domain cover on the NSE4 exam?
- Security Profiles questions test whether you can apply the concept in context, not just recognise a definition.
- How many questions are in this domain?
- This page lists all 65 Security Profiles questions in the NSE4 question bank. The actual exam draws from this domain proportionally to its weighting in the official exam blueprint.
- What is the best way to practise this domain?
- Start with a short focused session (10 questions) to identify gaps, then work through explanations. Repeat with a longer session once the weak areas feel solid.
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