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問題 #70
Refer to the exhibits.
A diagram of a FortiGate device connected to the network, as well as the firewall policy and IP pool configuration on the FortiGate device are shown.
Two PCs. PC1 and PC2, are connected behind FortiGate and can access the internet successfully. However, when the administrator adds a third PC to the network (PC3), the PC cannot connect to the internet.
Based on the information shown in the exhibit, which two configuration options can the administrator use to fix the connectivity issue for PC3? (Choose two.)
答案：A,B
解題說明：
From the exhibits:
The firewall policy has NAT enabled and is configured to Use Dynamic IP Pool.
The selected IP pool (Internet-pool) is configured as:
Type: One-to-One
External IP Range: 100.65.0.110-100.65.0.111 (only two public IPs)
PC1 and PC2 can access the internet because each one-to-one NAT mapping consumes one public IP from the pool. When PC3 is added, there is no third public IP available in the pool, so FortiGate cannot allocate a one-to-one mapping for PC3 and the session fails.
FortiOS behavior here is standard: with one-to-one IP pools, the available pool size limits how many distinct internal sources can be translated concurrently (depending on allocation and sessions), and a pool with only two IPs will not reliably support three separate hosts needing translations.
Therefore, the administrator can fix this in two valid ways:
B . In the IP pool configuration, set end ip to 100.65.0.112.
This expands the pool by adding an additional public IP address, making three public IPs available (.110, .111, .112), so PC3 can be assigned an address for one-to-one NAT.
D . In the IP pool configuration, set type to overload.
Changing the pool type to overload enables PAT (many-to-one), allowing multiple internal hosts (PC1, PC2, PC3) to share the pool address(es) using different source ports. This removes the "one public IP per internal host" limitation inherent to one-to-one pools.
Why the other options are not correct:
A . Multiple Interface Policies is unrelated to IP pool exhaustion and does not solve NAT allocation limits.
C . match-vip affects VIP matching behavior for destination NAT/virtual IP usage and does not address the source NAT pool shortage causing PC3 to fail.
問題 #71
Refer to the exhibit.
What would be the impact of these settings on the Server certificate SNI check configuration on FortiGate?
答案：C
解題說明：
Based on the exhibit and the FortiOS 7.6 SSL/SSH Inspection documentation, the correct answer is C.
Understanding the Exhibit Configuration
In the SSL/SSH Inspection Profile, the following settings are shown:
Inspection method: Full SSL Inspection
Server certificate SNI check: Strict
This setting directly controls how FortiGate validates the Server Name Indication (SNI) provided by the client during the TLS handshake.
FortiOS 7.6 Behavior of "Server certificate SNI check"
FortiOS supports three modes for Server certificate SNI check:
Disable
No validation between SNI and server certificate.
Enable
FortiGate checks SNI against the certificate.
If mismatch occurs, FortiGate may still allow the session with reduced validation.
Strict
FortiGate enforces a strict match.
The SNI must match either the CN (Common Name) or one of the SAN (Subject Alternative Name) entries in the server certificate.
If the SNI does not match either CN or SAN, the TLS session is immediately terminated.
The exhibit clearly shows Strict selected.
Why Option C is Correct
With Strict enabled, FortiGate rejects the TLS connection when:
The SNI does not match the CN, and
The SNI does not match any SAN entry
This results in the connection being closed, not allowed with warnings or fallback behavior.
Therefore:
C). FortiGate will close the connection if the SNI does not match the CN or SAN fields is exactly the documented behavior.
Why the Other Options Are Incorrect
A: FortiGate does not fall back to using the CN for URL filtering when Strict is enabled.
B: There is no "accept with warning" behavior in Strict mode.
D: Incorrect logical condition. FortiGate does not require mismatch with both CN and SAN simultaneously; a mismatch with either valid field set is sufficient to close the connection.
問題 #72
Refer to the exhibit.
Why is the Antivirus scan switch grayed out when you are creating a new antivirus profile for FTP?
答案：B
解題說明：
In FortiOS 7.6, the Antivirus scan master switch in an antivirus profile becomes available only after at least one supported protocol is enabled for inspection.
What the exhibit shows
A new antivirus profile named FTP_AV_Profile
Feature set: Flow-based
Antivirus scan switch is grayed out
All Inspected Protocols (HTTP, SMTP, POP3, IMAP, FTP, CIFS) are currently disabled Why the Antivirus scan switch is grayed out In FortiOS antivirus profiles:
The Antivirus scan toggle is a dependent control
It cannot be enabled unless at least one inspected protocol is selected This prevents enabling AV scanning when there is no traffic type to scan This behavior is documented in the FortiOS 7.6 Antivirus Profile configuration section.
Once you enable a protocol (for example, FTP), the Antivirus scan switch becomes active and configurable.
Why option B is correct
B . None of the inspected protocols are active in this profile.
All protocol toggles are OFF
Therefore, FortiGate disables (grays out) the Antivirus scan option
This is expected and correct behavior
Why the other options are incorrect
A . Antivirus scan is disabled under Feature visibility
Incorrect. Feature Visibility controls whether Antivirus appears in the GUI, not whether the scan switch is enabled inside a profile.
C . Feature set must be Proxy-based
Incorrect. Antivirus scanning is supported in both flow-based and proxy-based modes.
D . Less than 2 GB RAM does not support Antivirus scan
Incorrect. Memory size affects performance and offloading, not basic AV scan availability.
問題 #73
Refer to the exhibit.
A partial cloud topology is shown.
You deployed a FortiGate Cloud-Native Firewall (CNF) in AWS for FortiGate CNF policy enforcement for EC2 instance traffic. Which path does the EC2 traffic take from the EC2 instance to the internet?
答案：C
解題說明：
FortiGate CNF in AWS uses a Gateway Load Balancer endpoint (GWLBe) in the protected VPC to steer workload traffic toward the FortiGate CNF service for inspection. The EC2 instance does not send traffic directly to the internet gateway first, and the CNF is not placed inline as a normal VM firewall inside the EC2 subnet. Instead, AWS routing sends the EC2 traffic to the relevant GWLBe.
The traffic is then forwarded to FortiGate CNF, where security policies are evaluated and enforced. If the traffic is allowed, it is returned to the same GWLBe and then continues toward the internet gateway. Therefore, the correct traffic path is EC2 instance # GWLBe # FortiGate CNF # GWLBe # IGW # internet.
問題 #74
Refer to the exhibits.
You are asked to implement an antivirus profile for files downloaded through FTP, HTTP, and HTTPS.
While testing, you are successful with HTTP and FTP protocols, but FortiGate does not block the file download over HTTPS.
What could be the cause?
答案：B
解題說明：
The SSL inspection mode in the firewall policy is set to certificate-inspection, which only examines SSL certificates without decrypting HTTPS traffic. Because of this, FortiGate cannot inspect or block files downloaded over HTTPS, as the content remains encrypted. To enable antivirus scanning on HTTPS traffic, the SSL inspection mode must be set to deep-inspection, allowing the FortiGate to decrypt, inspect, and re-encrypt the traffic.
問題 #75
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