Exclude HTTPS Traffic from SSL Inspection: Valid Methods
Which THREE of the following are valid methods to exclude certain HTTPS traffic from SSL inspection on a FortiGate?
Quick Answer
The answer is adding the destination IP address to the 'SSL Exempt IPs' list within the SSL/SSH inspection profile, along with using the 'SSL Exempt Domains' list and configuring a firewall policy to bypass inspection. These methods allow you to exclude HTTPS traffic from SSL inspection by specifying trusted destinations or domains that FortiGate will skip decrypting, matching the SNI field or certificate CN/SAN to reduce overhead. On the Fortinet NSE 4 Network Security Professional NSE4 exam, this topic tests your understanding of how to balance security with performance by selectively exempting traffic, often appearing in scenario-based questions where you must choose the correct exemption method. A common trap is confusing the 'SSL Exempt IPs' list with certificate inspection profiles—remember that IPs and domains are exempted in the SSL/SSH profile itself, not in firewall policies. Memory tip: "Exempt by IP, domain, or policy—three ways to skip the decrypt key."
⚠ Common exam trap
A common mix-up: candidates confuse web filter category exemptions with SSL inspection exemptions, but web filter exemptions only affect URL filtering decisions, not the decryption process itself.
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
✓
Adding the domain to the 'SSL Exempt Domains' list in the SSL/SSH inspection profile.
The 'SSL Exempt Domains' list in the SSL/SSH inspection profile allows you to specify domain names (e.g., *.example.com) that will bypass SSL inspection entirely. When FortiGate matches the SNI field in the ClientHello or the certificate CN/SAN against this list, it skips decryption and passes the traffic through without inspection, reducing overhead for trusted or non-critical domains.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Adding the domain to the 'SSL Exempt Domains' list in the SSL/SSH inspection profile.
Why this is correct
Domain-based exemption is a supported method.
- ✗
Setting the firewall policy action to 'accept' with no inspection.
Why it's wrong here
This would apply to all traffic in the policy, not as a selective exemption.
- ✓
Using a certificate category exemption (e.g., exempting 'Fortinet Trusted Certificate').
Why this is correct
Certificate category exemption is a supported method.
- ✗
Using a web filter category exemption.
Why it's wrong here
Web filter categories do not exempt from SSL inspection.
- ✓
Adding the destination IP address to the 'SSL Exempt IPs' list in the SSL/SSH inspection profile.
Why this is correct
IP-based exemption is a supported method.
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Same concept, more angles
1 more way this is tested on NSE4
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A 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?
medium- A.Disable certificate validation in the SSL inspection profile
- B.Create a separate firewall policy without SSL inspection
- C.Set the action for invalid certificates to 'allow'
- ✓ D.Add the websites to the SSL/SSH exemption list
Why D: The SSL/SSH exemption list allows administrators to specify websites that should bypass SSL deep inspection entirely, preventing certificate errors for sites that use self-signed, expired, or otherwise untrusted certificates. This is the intended mechanism in FortiOS to exclude specific destinations from inspection while maintaining inspection for all other traffic.
JA
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.