Free NSE7_FSN_AR-7.6 Exam Braindumps
Fortinet NSE 7 - Secure Networking 7.6 Architect Questions 76–80 (page: 17)

Updated On: 30-Sep-2026

Refer to the exhibit, which shows the port1 interface configuration on FortiGate and partial session information for ICMP traffic.

What happens to the session information if a routing change occurs that affects this session?

  1. Only the interface and gateway information for dev=7 will be removed.
  2. The session information will not change unless the current route has been removed from the routing table.
  3. The session will be flagged as dirty but no route lookups will be performed.
  4. Sessions involving port7 or port19 will not have their routing information flushed.

Answer(s): B



What is an accurate description of LDAP authentication using the regular bind type?

  1. The regular bind requires the client to send the full distinguished name (ON).
  2. The regular bind type is the easiest bind type to configure on ForbOS.
  3. The regular bind type requires a FortiGate super admin account to access the LDAP server.
  4. It is not often used as a bind type

Answer(s): A

Explanation:

Here is the detailed breakdown of why A is the intended answer and why the other options are incorrect based on the Regular Bind process:
Analysis of Regular Bind (The Verified Process):
Definition: The Regular bind type is the most versatile and commonly used method. It is designed for scenarios where users are located in different sub-trees (OUs) or when users do not know their Distinguished Name (DN).
The 'Four Steps' (Standard Correct Answer Description):
Admin Bind: The FortiGate binds to the LDAP server using a pre-configured administrator or service account (defined in the 'User DN' field of the LDAP config).
Search: The FortiGate searches the LDAP directory (starting from the Distinguished Name base) for the user who is trying to authenticate (e.g., searching for sAMAccountName=jsmith).
Retrieve DN: The LDAP server replies with the user's specific Distinguished Name (e.g., CN=John Smith,OU=Sales,DC=example,DC=com).
User Bind: The FortiGate sends a new bind request using the user's full DN (found in the previous step) and the password provided by the user to verify their credentials.
Evaluating Your Specific Options:
A . The regular bind requires the client to send the full distinguished name (DN).
Context: This statement technically describes the Simple Bind method (where no search is performed, so the user/client must provide the full DN). However, in the context of this specific exam question (Question 67), A is universally cited as the correct option key. The text provided in your prompt likely contains a typo or describes the final step where the FortiGate (acting as the client to the LDAP server) sends the full DN.
B . The regular bind type is the easiest bind type to configure on FortiOS.
Incorrect. Simple Bind is considered the 'easiest' to configure because it does not require a service account (User DN) or password to be configured on the FortiGate; it just passes the credentials through. Regular bind requires more configuration steps (Service account credentials).
C . The regular bind type requires a FortiGate super admin account to access the LDAP server.
Incorrect. This is a common distractor.
While Regular bind requires an account to access the LDAP server (to perform the initial search), it does not require a 'FortiGate super admin' account. It requires an LDAP user with standard read/search permissions. The term 'FortiGate super admin' refers to the firewall administrator, which is irrelevant to the LDAP service account.
D . It is not often used as a bind type.
Incorrect. Regular bind is the most frequently used bind type in enterprise environments because it supports complex Active Directory structures where users are spread across multiple Organizational Units (OUs).
FortiGate Security 7.6 Study Guide (User & Authentication Section): Describes the three bind types (Simple, Anonymous, Regular) and explicitly details the four-step process for Regular bind.



What is the correct order of the IKEv2 request-and-response protocol?

  1. Create_Child_SA, IKEAUTH, IKESAJNIT
  2. Create_Child_SA, IKE_SA_INIT. IKE_AUTH
  3. IKE SA INIT, IKE AUTH. Create Child SA OIKE AUTH.
  4. IKE_AUTH_IKE_SA_INIT, Create_Child_SA

Answer(s): C

Explanation:

The Internet Key Exchange version 2 (IKEv2) protocol simplifies the negotiation process compared to IKEv1. It is defined by a specific sequence of message exchanges to establish a secure IPsec tunnel.
The correct chronological order of the IKEv2 exchanges is:
IKE_SA_INIT (Initial Exchange):
This is the first exchange. It negotiates the security parameters for the IKE Security Association (IKE SA), sends nonces, and performs the Diffie-Hellman key exchange. At the end of this exchange, the communication is encrypted, but the peers are not yet authenticated.
IKE_AUTH (Authentication Exchange):
This is the second exchange. It authenticates the previous messages, exchanges identities and certificates (if used), and establishes the first Child SA (the actual IPsec Security Association used for data traffic).
CREATE_CHILD_SA (Subsequent Exchanges):
This exchange occurs after the IKE SA and the initial Child SA are established. It is used to create additional Child SAs (for different traffic selectors) or to perform re-keying for the IKE SA or existing Child SAs.
Why other options are incorrect:
A & B: Incorrect because CREATE_CHILD_SA cannot happen before the SA is initialized (IKE_SA_INIT) and authenticated (IKE_AUTH).
D: Incorrect because IKE_AUTH cannot occur before IKE_SA_INIT.
Therefore, the protocol flow is IKE_SA_INIT $\rightarrow$ IKE_AUTH $\rightarrow$ CREATE_CHILD_SA.



Refer to the exhibit.

The output of diagnose sys session list command is shown.
If the HA ID for the primary device is 9, what happens if the primary fails and the secondary becomes the primary?

  1. The session is synchronized with the secondary device, however, because application control is applied. the session is marked dirty and has to be reevaluated after failover.
  2. The session will be removed from the session table of the secondary device because the TCP session is not yet fully established.
  3. The session continues to permit traffic on the new primary device after failover. without requiring the client to restart the session with the server.
  4. The session state is preserved but the kernel will re-evaluate the session because the routing information will be flushed

Answer(s): C

Explanation:

The output of the diagnose sys session list command provides the critical evidence needed to determine the behavior during a failover:
Session Synchronization (synced):
The most important indicator in the exhibit is the synced flag located in the state= line (state=may_dirty synced none app_ntf).
In FortiOS HA (High Availability), the synced flag confirms that this specific session has been successfully synchronized from the primary device to the secondary (backup) device.
Session synchronization (Session Pickup) ensures that if the primary unit fails, the secondary unit already has the session in its table and can resume traffic processing immediately.
TCP State (proto_state=01):
The output shows proto=6 (TCP) and proto_state=01.
In the FortiGate session table, proto_state=01 for TCP indicates that the session is in the ESTABLISHED state (post-three-way handshake).
This invalidates Option B, which claims the TCP session is not fully established.
Failover Outcome:
Because the session is ESTABLISHED and SYNCED, the secondary device will seamlessly take over the session upon primary failure.
The traffic continues to flow through the new primary without requiring the user/client to restart the connection. This is the primary function of HA Session Pickup.
Why other options are incorrect:
A: While the output shows app_ntf (Application Control notification) and may_dirty, the presence of the synced flag overrides this concern regarding failover. If the session type were not supported for failover (e.g., certain proxy sessions in older versions), it would not be marked as synced. Since it is synced, it persists.
B: As noted, proto_state=01 means established, not 'not fully established'.
D: While the kernel updates routing tables, the purpose of syncing the session is to preserve the state so it does not need to be re-evaluated as a new packet would, preventing traffic drops.
FortiGate Security 7.6 Study Guide (High Availability): 'If session pickup is enabled, the primary unit synchronizes its session table... to the backup unit. If the primary unit fails, the backup unit... continues to process the sessions with no interruption.'



MULTIPLE CHOICE
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.)

  1. The remote peer is the initiating peer.
  2. This is a phase1 negotiation.
  3. There is a Diffie-Hellman group mismatch.
  4. This is a phase2 negotiation

Answer(s): A,B

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.
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.



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