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| Section | Objectives |
|---|---|
| Network Security Concepts and Architecture | - Fortinet Security Fabric Overview
|
| VPN and Secure Connectivity | - IPsec VPN
|
| Monitoring and Troubleshooting | - Logging and reporting
|
| Security Profiles and Content Inspection | - Antivirus and intrusion prevention
|
| FortiGate Deployment and System Configuration | - System maintenance
|
| Routing and SD-WAN | - SD-WAN configuration
|
| Firewall Policies and Authentication | - User authentication
|
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NEW QUESTION # 30
Refer to the exhibit.
A network administrator is troubleshooting an IPsec tunnel between two FortiGate devices. The administrator has determined that phase 1 status is up, but phase 2 fails to come up.
Based on the phase 2 configuration shown in the exhibit, which two configuration changes will bring phase 2 up? (Choose two.)
Answer: B,D
Explanation:
Phase 1 being up confirms the two FortiGate devices can authenticate and build the IKE SA. Phase 2 failing indicates the IPsec (Quick Mode) SA negotiation is failing due to mismatched Phase 2 parameters.
From the exhibit, the Phase 2 mismatches that would prevent SA establishment are:
1) Phase 2 selectors must mirror each other (Proxy IDs)
HQ-NGFW Phase 2 selector shows:
Local: 10.0.11.0/24
Remote: 172.20.1.0/24
BR1-FGT Phase 2 selector shows:
Local: 172.20.1.0/24
Remote: 10.11.0.0/24 # does not match HQ's local subnet (10.0.11.0/24)
In FortiOS, Phase 2 comes up only when the peers' selectors (proxy IDs) match as opposite pairs (local on one side = remote on the other).
# Fix: A. On BR1-FGT, set Remote Address to 10.0.11.0/255.255.255.0.
2) Phase 2 proposal must match (encryption/authentication)
HQ-NGFW shows encryption AES128 (with SHA1)
BR1-FGT shows encryption AES256 (with SHA1)
For Phase 2 to establish, both peers must have at least one common proposal (same encryption and authentication settings). With one side set to AES128 and the other to AES256, there is no match.
# Fix: D. On HQ-NGFW, set Encryption to AES256.
Why the other options are not correct
B). Enable Diffie-Hellman Group 2: The exhibit's mismatch is not resolved by adding DH group 2, and DH group must match when PFS is enabled. This option does not align the peers based on what's shown.
C). Set Seconds to 43200: Phase 2 lifetime mismatches typically do not prevent Phase 2 from coming up (the negotiated lifetime can be adjusted by the peers). The hard blockers here are the selectors and proposal mismatch.
NEW QUESTION # 31
Refer to the exhibits.
An administrator has observed the performance status outputs on an HA cluster for 55 seconds.
Which FortiGate is the primary?
Answer: C
Explanation:
From the HA configuration shown for HQ-NGFW-1:
set memory-based-failover enable
set memory-failover-threshold 70
set memory-failover-monitor-period 50
set memory-failover-sample-rate 10
set memory-failover-flip-timeout 60
set override disable
set priority 200
From the performance status outputs:
HQ-NGFW-1 memory used is 90% (well above the configured threshold of 70%) HQ-NGFW-2 memory used is about 48.7% (well below the threshold) What happens in FortiOS 7.6 with memory-based failover When memory-based failover is enabled, FortiGate monitors memory utilization. If the unit's memory usage stays above the configured memory-failover-threshold for the configured memory-failover-monitor-period, the cluster triggers a failover away from the unit under memory pressure.
Threshold = 70%
HQ-NGFW-1 is at 90%, so it violates the threshold.
Monitor period = 50 seconds.
The administrator observed for 55 seconds, which is longer than 50 seconds, so the condition is met for long enough to trigger failover.
The memory-failover-flip-timeout 60 is used to prevent rapid back-and-forth role changes (flapping) after a failover decision; it does not prevent the initial failover from occurring once the threshold breach persists for the monitor period.
NEW QUESTION # 32
You have configured the below commands on a FortiGate.
What would be the impact of this configuration on FortiGate?
Answer: C
NEW QUESTION # 33
Which two statements describe how the RPF check is used? (Choose two.)
Answer: A,D
Explanation:
The RPF (Reverse Path Forwarding) check is used to prevent IP spoofing attacks by verifying that the source IP address of a received packet is reachable through the same interface it arrived on. If not, the packet is dropped, ensuring traffic legitimacy.
The RPF check runs on the first sent packet of any new session to validate that the route to the source IP is consistent with the interface it's received on. This helps FortiGate detect spoofed or asymmetric routing scenarios early in the session establishment.
NEW QUESTION # 34
Refer to the exhibits, which show the system performance output and the default configuration of high memory usage thresholds in a FortiGate.
Based on the system performance output, what can be the two possible outcomes? (Choose two.)
Answer: A,B
Explanation:
FortiGate has entered conserve mode.
The system performance output shows memory usage at 90%, which exceeds the red threshold (88%) configured under memory-use-threshold-red. When this happens, FortiGate automatically enters conserve mode to preserve system stability by stopping or limiting memory-intensive processes.
Administrators cannot change the configuration.
In conserve mode, FortiGate restricts configuration changes and disables some non-essential services until memory usage drops below the green threshold (82%), ensuring that available memory is reserved for critical operations.
NEW QUESTION # 35
......
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