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>> Fortinet FCSS_NST_SE-7.6 Reliable Dumps Questions <<
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NEW QUESTION # 133
Refer to the exhibit, which a network topology and a partial routing table.
FortiGate has already been configured with a firewall policy that allows all ICMP traffic to flow from port1 to port3.
Which changes must the administrator perform to ensure the server at 10.4.0.1/24 receives the echo reply from the laptop at 10.1.0.1/24?
Answer: B
NEW QUESTION # 134
Refer to the exhibit.
If the default settings are m place, what can you conclude about the conserve mode shown in the exhibit?
Answer: A
Explanation:
To determine the behavior, we must analyze the memory thresholds and the current status shown in the exhibit:
* Analyze the Thresholds (The Three States):
* Green (Exit): 82% (Memory usage is safe).
* Red (Enter Conserve Mode): 88% (Memory usage is high; action is required).
* Extreme (Kernel Conserve Mode): 95% (Memory is critical; drastic action is required).
* Determine the Current State:
* Current Memory Used: 89%.
* Since 89% is greater than the Red threshold (88%) but lower than the Extreme threshold (95%), the FortiGate is in Red Conserve Mode (User-space conserve mode), not Extreme mode.
* Evaluate the Behavior in "Red" Mode:
* In Red Conserve Mode, the FortiGate's primary goal is to prevent memory exhaustion while still processing traffic if possible.
* Proxy-based inspection (handled by the WAD process) is memory-intensive because it buffers content. To save memory, the system stops accepting new sessions that require proxy-based inspection.
* Flow-based inspection (handled by the IPS engine) streams data and consumes significantly less memory. Therefore, in Red mode, the system typically continues to allow and inspect flow-based sessions.
* Option A correctly describes this split behavior: allowing flow-based (lighter) but blocking proxy-based (heavier).
* Why other options are incorrect:
* B: If memory increases another 6% (89% + 6% = 95%), the device hits the Extreme threshold.
At 95%, the kernel begins dropping all new sessions to prevent a system crash. Thus, it will not continue to allow sessions.
* C: This describes "Fail-Open" behavior (passing traffic without inspection). While configurable (set av-failopen pass), the default is usually "Fail-Close" (blocking). More importantly, the distinction between flow and proxy availability is the key architectural feature of Red mode.
* D: Blocking all new sessions regardless of type is the behavior of Extreme Conserve Mode (95%). Since the device is only at 89%, this drastic measure is not yet active.
Reference:
FortiGate Security 7.6 Study Guide (Diagnostics & Resource Usage): "When memory usage exceeds the red threshold... the FortiGate enters conserve mode. New sessions requiring proxy-based inspection may be dropped... When the extreme threshold is reached, all new sessions are dropped."
NEW QUESTION # 135
Refer to the exhibits.
An OSPF peer is advertising route 172.16.52.0/24. The local FortiGate is configured with an inbound distribution list that allows the 172.16.0.0/16 network to be injected into its routing table. However, the
1'2.16.52.0/24 subnet cannot be seen in the FIB.
Which two stops can the administrator of the local FortiGate take to ensure that the advertised 172.16. 52.0/24 subnet will be injected into the routing table? (Choose two.)
Answer: A,B
Explanation:
The issue is caused by the strict matching logic of the configured Prefix List.
Current State: The rule is edit 1 with set prefix 172.16.0.0 255.255.0.0 and both ge (greater than or equal) and le (less than or equal) are unset.
Behavior: When ge and le are unset, FortiOS requires an exact match of the subnet mask. The current rule only matches the exact network 172.16.0.0/16. It denies 172.16.52.0/24 because the mask (/24) does not match the rule's mask (/16).
To fix this and inject 172.16.52.0/24, you must modify the list to match the /24 mask:
A). Add another entry to the prefix list to specifically allow the 172.16.52.0/24 network:
Creating a new rule (e.g., edit 2) with set prefix 172.16.52.0 255.255.255.0 will provide an exact match for the incoming route, allowing it to pass the distribute-list.
B). Change the ge value to 17:
By configuring set ge 17 on the existing rule (conceptually 172.16.0.0/16 ge 17), you change the logic from
"exact match" to "range match".
This configuration tells the router to match any prefix starting with 172.16.x.x that has a subnet mask length of 17 or greater.
Since the incoming route is a /24, and 24 is greater than 17, the route will match the prefix list and be accepted.
Why other options are incorrect:
C: The option text appears to read "Change the ... value to 16". If this refers to le 16, it would enforce the mask to be exactly /16 or less, which still excludes /24.
D: Changing the default behavior to implicit allow defeats the purpose of a filter (security control) and is not a standard configuration step for fixing a single missing route.
Reference:
FortiGate Security 7.6 Study Guide (Routing): "In prefix-lists, if ge and le are not used, the subnet mask must match exactly. To match subnets within a range, you must define the prefix length boundaries using ge or le."
NEW QUESTION # 136
Exhibit 1.
Exhibit 2.
Refer to the exhibits, which show the configuration on FortiGate and partial internet session information from a user on the internal network.
An administrator would like to lest session failover between the two service provider connections.
Which two changes must the administrator make to force this existing session to immediately start using the other interface? (Choose two.)
Answer: B,D
Explanation:
FortiOS Admin Guide: Static Routing, SNAT Route Change Feature
NEW QUESTION # 137
Refer to the exhibit, which shows a session entry.
Which statement about this session is true?
Answer: C
Explanation:
The session output reveals a session with proto=1 (ICMP) and the origin and reply directions show address and NAT translations. Specifically, the hook=post dir=org act=snat shows that source NAT is performed for outgoing packets, where the source 10.1.10.10:40602 is translated to 10.200.5.1:8 (likely ICMP id 8, not a TCP/UDP port). The reply direction, hook=pre dir=reply act=dnat, indicates destination NAT for incoming packets: packets incoming for 10.200.5.1:60430 are destination-NATed to 10.1.10.10:40602. The gateway (gwy) is listed as 10.200.1.254/10.1.0.1, which for outgoing traffic means that return traffic is directed to the gateway (10.200.1.254), per the NAT policy. This is confirmed by the FortiOS Session Table Guide, which explains that the returned ICMP reply will be routed out to this NAT gateway. The session statistics and logical flow (SNAT out, matching DNAT in) reinforce that reply traffic to the initiator traverses via
10.200.1.254.
References:
FortiOS Administration Guide: Session Table, NAT, and Route Interaction Fortinet Technical Note: Diagnose sys session list, Direction and NAT Analysis
NEW QUESTION # 138
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