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| Section | Objectives |
|---|---|
| Enterprise Firewall | - Security profiles
|
| SD-WAN | - Traffic steering
|
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NEW QUESTION # 175
Refer to the exhibit.
An IPsec VPN tunnel using IKEv2 was brought up successfully, but when the tunnel rekey takes place the tunnel goes down.
The debug command for IKE was enabled and, in the exhibit, you can review the partial output of the debug IKE while attempting to bring the tunnel up.
What is causing. The tunnel to be down?
Answer: B
Explanation:
To determine the cause of the failure, we must analyze the IKEv2 debug output provided in the exhibit (image_ad3dc6.jpg):
Identify the Negotiation Phase:
The debug log shows: responder received CREATE_CHILD exchange.
In IKEv2, the CREATE_CHILD_SA exchange is used to create new Child SAs (Phase 2) or to rekey existing ones.
The fact that the tunnel was previously " brought up successfully " implies the initial IKE SA (Phase 1) is stable, and this error is occurring specifically during a rekey event, which often involves Perfect Forward Secrecy (PFS).
Analyze the Proposals (The Mismatch):
Incoming Proposal (Remote Peer):
The remote peer sends a proposal containing two Diffie-Hellman groups: type=DH_GROUP, val=MODP2048 (Group 14) and type=DH_GROUP, val=MODP1536 (Group 5).
My Proposal (Local FortiGate):
The local FortiGate configuration expects: type=DH_GROUP, val=MODP3072 (Group 15).
Result of the Negotiation:
The debug output concludes with: no proposal chosen and Negotiate SA Error.
This error occurs because the local FortiGate cannot find a common Diffie-Hellman group between what it requires (Group 15) and what the peer is offering (Groups 14 or 5).
While this is technically a mismatch occurring during the Phase 2 (Child SA) creation, " A Diffie-Hellman mismatch " (Option A) is the precise root cause identified in the logs.
Why other options are incorrect:
B: The log shows received create-child request, confirming that UDP traffic is reaching the device and is not blocked.
C: The failure is in the CREATE_CHILD exchange (Phase 2/Rekey), not the IKE_SA_INIT or IKE_AUTH (Phase 1) exchanges.
D: While the mismatch is occurring within the Phase 2 definitions, Option A is the specific technical reason for the no proposal chosen error shown in the DH_GROUP lines.
Reference:
FortiGate Security 7.6 Study Guide (IPsec VPN): " Phase 2 parameters... if Perfect Forward Secrecy (PFS) is enabled, a Diffie-Hellman exchange is performed again. Both peers must match the DH Group. "
NEW QUESTION # 176
Refer to the exhibit.
The VDOM configuration on a FortiGate device is shown. You discover that web filtering stopped working in Core1 and Core2 after a maintenance window.
What are two reasons why web filtering stopped working? (Choose two answers.)
Answer: A,D
Explanation:
The exhibit identifies the root VDOM as the management VDOM, indicated by the green check mark. The Enterprise Firewall 7.6 Administrator Study Guide explains that the management VDOM handles FortiGuard database downloads, license validation, and FortiGuard rating connectivity on behalf of the entire FortiGate system. It states that FortiGuard updates obtained through the management VDOM "will affect all VDOMs." Consequently, the root VDOM must reach either a public Fortinet Distribution Network server or a FortiManager configured as a FortiGuard Distribution Server in an isolated environment. The guide specifically identifies connectivity to "a FortiManager serving as a FortiGuard Distribution Server (FDS) in a closed network" as the alternative to public FortiGuard access. Loss of both paths prevents Core1 and Core2 from using current FortiGuard web-filtering information. Therefore, options A and B are correct.
Core1 and Core2 do not need to become management VDOMs; FortiGate uses one designated management VDOM for these system-level services. A VDOM link is used to route user traffic between VDOMs and is not required for distributing FortiGuard services, eliminating option D.
NEW QUESTION # 177
Refer to the exhibit.
Which two statements about the output are true, considering NGFW-1 and NGFW-2 have been up for a week? (Choose two.)
Answer: B,D
Explanation:
The correct answers are A and B .
The exhibit shows:
* override: disable
* both members are currently in-sync
* only port7 appears under HBDEV stats , so it is the active heartbeat interface
* the cluster is in HA A-P mode
Why A is correct:
With override disabled , after a failover the new primary keeps that role when the old primary comes back.
The FortiOS administration guide states:
"When the primary FortiGate rejoins the cluster the secondary FortiGate continues to operate as the primary FortiGate." So if FGVM...649 reboots and FGVM...650 becomes primary, FGVM...650 will remain primary after FGVM...649 rejoins.
Why B is correct:
The study guide states:
"When FortiGate devices configured in an HA cluster lose communication with each other on the heartbeat interface, each FortiGate assumes the role of the primary device." The exhibit shows only port7 as the heartbeat device in HBDEV stats So if port7 is disconnected and heartbeat communication is lost, the cluster can enter a split-brain condition, where both units believe they are primary. The FortiOS administration guide confirms the same behavior: loss of heartbeat communication causes each member to think it is the primary Why the other options are wrong:
* C is wrong because configuration synchronization status is specifically used to detect whether secondary members remain synchronized with the primary. If members are no longer synchronized, the status changes from in-sync to out-of-sync
* D is wrong because the study guide explains that during a configuration change, checksums may differ briefly while changes are copied, but it does not describe this as the secondary initiating a
"synchronization reset"
So the verified answers are: A, B .
NEW QUESTION # 178
Refer to the exhibit, which shows the omitted output of a session table entry.
Which two statements are true? (Choose two.)
Answer: B,C
Explanation:
In the provided session table output, the following details justify the answers:
Policy ID Match: The line policy_id=1 directly confirms that this session was matched by Firewall Policy ID
1. According to Fortinet's session table documentation, the policy_id field always references the policy that allowed this session, so this is a clear indicator.
Session Offloading: The presence of the strings npu_state, ips_offload, and notably the NPU info section such as offload=8/8, ips_offload=1/1 shows that this session has been offloaded to the Network Processor Unit (NPU). Fortinet technical documentation states that " offload " values greater than zero in both directions (and an NPU info section) affirm that NPU hardware processing (fast path) is handling this traffic, thus the session is not being handled in software only.
Other options:
VLAN Tagging (vlan=0x0000/0x0000): This means no VLAN tag is assigned to this session.
NP7: The actual NPU model handling the session isn't exposed in this snippet-the offload parameters shown are generic and not specific to NP7 hardware, so it cannot be concluded from the session data.
References:
Fortinet Technical Tip: FortiGate Session Table and NPU Offloading
FortiOS Diagnostics Guide: Policy ID, Offload, and VLAN Session Table Fields
NEW QUESTION # 179
Refer to the exhibit.
A partial output from an IKE real-time debug is shown
The administrator does not have access to (he remote gateway
Based on the debug output, which two conclusions can you draw? (Choose two.)
Answer: B,C
Explanation:
To determine the correct conclusions, we analyze the specific lines in the IKE real-time debug output provided in the exhibit:
Analysis for Option A (The remote peer is the initiating peer):
Evidence: The very first line of the debug output reads: ike 0:624000:98: responder: main mode get 1st message...
The keyword responder indicates that this local FortiGate is receiving the connection request. Consequently, the remote peer must be the initiator sending the request. The phrase " get 1st message " confirms the local unit is receiving the initial packet of the negotiation sequence.
Conclusion: This statement is True.
Analysis for Option B (This is a phase 1 negotiation):
Evidence: The same line mentions main mode.
In IPsec VPNs, Main Mode and Aggressive Mode are exclusively used for Phase 1 (IKE SA) negotiations.
Phase 2 (Child SA) negotiations use Quick Mode. The presence of " main mode " definitively identifies this as a Phase 1 exchange.
Conclusion: This statement is True.
Analysis for Option C (There is a Diffie-Hellman group mismatch):
Evidence:
Incoming proposal (Remote): Lists type=OAKLEY_GROUP, val=MODP2048 (Group 14) in the first proposal proposal.
My proposal (Local): Lists type=OAKLEY_GROUP, val=MODP2048 (Group 14).
Since both the remote peer and the local gateway support and are proposing MODP2048 (Group 14), there is no Diffie-Hellman group mismatch. The actual mismatch visible in the logs is between the Encryption/Hash algorithms (Remote proposes AES-256/SHA2-256, while Local proposes AES-128/SHA), but the DH groups match.
Conclusion: This statement is False.
Analysis for Option D (This is a phase 2 negotiation):
As established in the analysis for Option B, " Main Mode " is a Phase 1 protocol. If this were Phase 2, the debug would show " Quick Mode " .
Conclusion: This statement is False.
Reference:
FortiGate Security 7.6 Study Guide (IPsec VPN): " Phase 1 modes: Main mode and Aggressive mode. " FortiOS Debugging documentation: Explains that " responder " indicates the device receiving the IKE initialization.
NEW QUESTION # 180
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