NSE4 Security Profiles Practice Question
Which THREE steps are necessary when configuring SSL deep inspection on FortiGate? (Choose three.)
⚠ Common exam trap
Test-takers frequently confuse general network configuration steps (like static routes) with SSL inspection-specific steps, or mistakenly think a separate forward proxy server must be configured, when in fact FortiGate handles the proxy role internally.
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
✓
Create an SSL inspection profile defining the inspection mode.
An SSL inspection profile defines how FortiGate handles encrypted traffic, including the inspection mode (e.g., full or certificate-inspection). This profile is a mandatory component for deep inspection, as it specifies whether to decrypt, re-encrypt, or simply examine certificates.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Add a static route to the internet.
Why it's wrong here
For SSL deep inspection to work, you don't add a static route as a configuration step; routing is a separate prerequisite for reaching external destinations. Deep inspection occurs after the routing decision, so a route to the internet may be needed for general connectivity but it's not part of the inspection configuration process itself.
- ✓
Create an SSL inspection profile defining the inspection mode.
Why this is correct
The SSL/SSH inspection profile is where you choose between certificate inspection (which looks only at the server certificate) and full SSL inspection (which decrypts, inspects, and re-encrypts traffic). It also lets you configure actions for invalid certificates, expired ones, and whether to inspect specific protocols like HTTPS or SMTPS. Without creating such a profile, there is no definition of how deep inspection should behave, making it a necessary first step.
- ✗
Configure a forward proxy server.
Why it's wrong here
A FortiGate performing full SSL inspection already functions as a forward proxy in the data path, intercepting and decrypting client requests on behalf of the client. There is no need to separately configure a forward proxy server, nor does FortiGate need to point to an external proxy for deep inspection to work. This option confuses the built-in proxy capability with a separate component, so it is not a required step.
- ✓
Apply the SSL inspection profile to a firewall policy.
Why this is correct
A profile merely exists in the FortiGate configuration; it only affects traffic after you attach it to one or more firewall policies. The policy must match the source, destination, and service of the traffic you want to inspect, and the profile is then referenced in the policy's security profile settings. This is the step that activates deep inspection in the flow, so it is as necessary as creating the profile itself.
- ✓
Generate or import a CA certificate on FortiGate.
Why this is correct
In full SSL inspection, the FortiGate generates a root CA certificate (or you can import one from an internal PKI) that it uses to dynamically sign the substitute server certificates for the sites the client visits. Without this CA, there is no way for the FortiGate to re-encrypt decrypted traffic in a way that clients can validate. The CA certificate is essential; if a custom CA is externally generated, it must be trusted by all client machines that will access the internet through the FortiGate.
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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.