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| Section | Objectives |
|---|---|
| Enterprise Firewall | - VPN technologies - Advanced firewall deployment - High availability - Routing and advanced networking - Security Fabric integration - Centralized management and analytics - Troubleshooting - Authentication and identity |
| SD-WAN | - Deployment and troubleshooting - Performance SLA - Overlay VPN - Application steering - SD-WAN routing - SD-WAN architecture |
>> Question NSE7_FSN_AR-7.6 Explanations <<
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NEW QUESTION # 149
Refer to the exhibit.
An IPsec VPN tunnel is dropping, as shown by the debug output.
Analyzing the debug output, what could be causing the tunnel to go down?
Answer: A
NEW QUESTION # 150
What is the diagnose test application ipsmonitor 5 command used for? (Choose one answer)
Answer: D
Explanation:
The correct answer is D .
The study guide shows the ipsmonitor test usage exactly:
* 1: Display IPS engine information
* 2: Toggle IPS engine enable/disable status
* 5: Toggle bypass status
* 99: Restart all IPS engines and monitor
So diagnose test application ipsmonitor 5 is used to toggle bypass status , which corresponds to enabling IPS bypass mode .
Why the other options are wrong:
* A is wrong because disabling the IPS engine is option 2 , not 5.
* B is wrong because the study guide does not define option 5 as IPS session information.
* C is wrong because restarting all IPS engines and monitors is option 99 , not 5.
So the verified answer is: D .
NEW QUESTION # 151
Refer to the exhibits, which contain the partial configurations of two VPNs on FortiGate.
An administrator has configured two VPNs for two different user groups. Users who are in the Users-2 group are not able to connect to the VPN. After running a diagnostics command, the administrator discovers that FortiGate is not matching the user-2 VPN for members of the Users-2 group.
Which two changes must the administrator make to fix the issue? (Choose two.)
Answer: B,C
Explanation:
The key point is that the two VPNs are dynamic dialup IPsec tunnels on the same interface and both are using IKEv1 main mode. In this design, FortiGate cannot reliably distinguish which dialup phase1 to match before phase 1 completes.
The uploaded Network Security Support Engineer 7.6 Study Guide shows that XAuth happens only after phase 1 is already established:
"The IKE real-time debug shows, after phase 1, the exchange of extended authentication (XAuth) packets...
You can also see the CFG_REPLY, showing the XAuth user and group name." That means the user group is learned too late to be used for selecting the correct phase1 definition. So the fix must be applied to the phase1 matching method itself, not to XAuth.
The FortiOS administration guide gives the exact rule for this scenario:
"When the remote VPN peer has a dynamic IP address and is authenticated by a pre-shared key you must select Aggressive mode if there is more than one dialup phase 1 configuration for the interface IP address."
NEW QUESTION # 152
Refer to the exhibit.
The output of the command diagnose vpn tunnels liar is shown.
Which two statements accurately describe the status of the tunnel? (Choose two.)
Answer: B,C
Explanation:
Based on the Fortinet FCSS - Network Security 7.6 documents and the analysis of the VPN tunnel exhibit, here is the verified answer.
Questions no: 91
Verified answer: A, C
Comprehensive and Detailed Explanation with all FCSS - Network Security 7.6 documents:
To determine the status of the VPN tunnel, we must examine the specific counters and fields in the diagnose vpn tunnel list output provided in the exhibit.
Analyze Phase 2 Status (Option A):
The output displays child_num=0.
In IKEv2 (and IKEv1 implementations in FortiOS), " Child SAs " refer to the Phase 2 (IPsec) Security Associations that carry the actual data traffic.
A value of 0 indicates that no Phase 2 tunnels are established. If Phase 2 were up, child_num would be at least
1.
Additionally, under the proxyid section, the field sa=0 confirms there is no active Security Association for that traffic selector.
Analyze Traffic Status (Option C):
The stat line shows: rxp=0 txp=0 rxb=0 txb=0.
rxp (Received Packets) and txp (Transmitted Packets) are both zero. This definitively confirms that no traffic is traversing the tunnel currently. This is expected since Phase 2 is down.
Analyze Phase 1 Status (Why B is incorrect):
The tunnel entry exists in the list with a valid tun_id, and NAT-Traversal is active (natt: mode=keepalive).
The presence of the tunnel in this command output, along with active Keepalive mechanisms, typically indicates that Phase 1 (IKE SA) is established and the peers are communicating on port 4500 (NAT-T), even though the data tunnels (Phase 2) failed to negotiate. If Phase 1 were down, the tunnel would often not appear in this " list " view or would show different status flags indicating a complete connection failure.
Conclusion: The exhibit shows a scenario where the Phase 1 control channel is likely up (evidenced by the entry existence and NATT keepalives), but the Phase 2 data channel is down (child_num=0), resulting in zero traffic flow (rxp=0/txp=0).
NEW QUESTION # 153
During which phase of IKEv2 does the Diffie-Helman key exchange take place?
Answer: D
NEW QUESTION # 154
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