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NEW QUESTION # 52
Exhibit:
Referring to the flow logs exhibit, which two statements are correct? (Choose two.)
- A. The data shown requires a traceoptions flag of basic-datapath.
- B. The packet is dropped by a configured security policy.
- C. The data shown requires a traceoptions flag of host-traffic.
- D. The packet is dropped by the default security policy.
Answer: A,D
Explanation:
* Understanding the Flow Log Output:
From the flow logs in the exhibit, we can observe the following key events:
* The session creation was initiated (flow_first_create_session), but the policy search failed (flow_first_policy_search), which implies that no matching policy was found between the zones involved (zone trust-> zone dmz).
* The packet was dropped with the reason "denied by policy." This shows that the packet was dropped either due to no matching security policy or because the default policy denies the traffic (packet dropped, denied by policy).
* The line denied by policy default-policy-logical-system-00(2) indicates that the default security policy is responsible for denying the traffic, confirming that no explicit security policy was configured to allow this traffic.
* Explanation of Answer A (Dropped by the default security policy):
The log message clearly states that the packet was dropped by the default security policy (default-policy- logical-system-00). In Junos, when a session is attempted between two zones and no explicit policy exists to allow the traffic, the default policy is to deny the traffic. This is a common behavior in Junos OS when a security policy does not explicitly allow traffic between zones.
* Explanation of Answer D (Requires traceoptions flag of basic-datapath):
The information displayed in the log involves session creation, flow policy search, and packet dropping due to policy violations, which are all part of basic packet processing in the data path. This type of information is logged when the traceoptions flag is set to basic-datapath. The basic-datapath traceoption provides detailed information about the forwarding process, including policy lookups and packet drops, which is precisely what we see in the exhibit.
* The traceoptions flag host-traffic (Answer C) is incorrect because host-traffic is typically used for traffic destined to or generated from the Junos device itself (e.g., SSH or SNMP traffic to the SRX device), not for traffic passing through the device.
* To capture flow processing details like those shown, you need the basic-datapath traceoptions flag, which provides details about packet forwarding and policy evaluation.
Step-by-Step Configuration for Tracing (Basic-Datapath):
* Enable flow traceoptions:
To capture detailed information about how traffic is being processed, including policy lookups and flow session creation, enable traceoptions for the flow.
bash
set security flow traceoptions file flow-log
set security flow traceoptions flag basic-datapath
* Apply the configuration and commit:
bash
commit
* View the logs:
Once enabled, you can check the trace logs for packet flows, policy lookups, and session creation details:
bash
show log flow-log
This log will contain information similar to the exhibit, including session creation attempts and packet drops due to security policy.
Juniper Security Reference:
* Default Security Policies: Juniper SRX devices have a default security policy to deny all traffic that is not explicitly allowed by user-defined policies. This is essential for security best practices. Reference:
Juniper Networks Documentation on Security Policies.
* Traceoptions for Debugging Flows: Using traceoptions is crucial for debugging and understanding how traffic is handled by the SRX, particularly when issues arise from policy misconfigurations or routing. Reference: Juniper Traceoptions.
By using the basic-datapath traceoptions, you can gain insights into how the device processes traffic, including policy lookups, route lookups, and packet drops, as demonstrated in the exhibit.
NEW QUESTION # 53
Exhibit.
Referring to the exhibit, which two statements are true? (Choose two.)
- A. The custom infected hosts feed will overwrite the Sky ATP infected host's feed.
- B. The custom infected hosts feed will not overwrite the Sky ATP infected host's feed.
- C. Juniper Networks will not investigate false positives generated by this custom feed.
- D. Juniper Networks will investigate false positives generated by this custom feed.
Answer: B,C
Explanation:
Juniper Networks will not investigate false positives generated by this custom feed. - Typically, a vendor like Juniper Networks would not investigate false positives generated by a custom feed because the feed content is controlled by the customer, not Juniper.
The custom infected hosts feed will not overwrite the Sky ATP infected host's feed. - Custom feeds are generally additional to the feeds provided by a vendor's threat intelligence platform like Sky ATP. They are used to supplement the existing threat intelligence and do not overwrite it, but rather work alongside it.
NEW QUESTION # 54
Referring to the exhibit,
which two statements are correct about the NAT configuration? (Choose two.)
- A. Only a specific host can initiate a session to the reflexive address after the initial session.
- B. Both the internal and the external host can initiate a session after the initial translation.
- C. Any external host will be able to initiate a session to the reflexive address.
- D. The original destination port is used for the source port for the session.
Answer: A,D
Explanation:
Persistent NAT with target-host restricts session initiation to specific addresses, enhancing security. Reflexive NAT supports multiple connections by preserving the original port. Refer to Juniper NAT Configuration Documentation.
Referring to the NAT configuration shown in the exhibit:
* Specific Host Can Initiate a Session (Answer B): The configuration usespersistent NATwith the permit target-host-port statement. This allows a specific external host (based on the target host and port used in the initial session) to initiate a session back to the internal host after the initial session has been established.
Explanation: Persistent NAT ensures that the translation state is maintained, allowing external hosts to connect back only under specific conditions (e.g., the same target host and port as used in the original connection).
* Original Destination Port (Answer D): The original destination port used by the internal host is retained as the source port when the session is established from outside to inside. This behavior is a result of how persistent NAT binds the internal and external sessions, ensuring that communication occurs over the same port used for the initial session.
NEW QUESTION # 55
Which two elements are necessary to configure a rule under an APBR profile? (Choose Two)
- A. instance type
- B. then action
- C. RIB group
- D. match condition
Answer: B,D
Explanation:
Here's why those elements are necessary for configuring a rule under an APBR profile:
B: Match condition: This defines the criteria for matching traffic to the APBR rule. It can include:
Applications: Match based on specific applications or application groups. URL categories: Match based on URL categories provided by a web filtering service. Other criteria: You can also match based on source/destination IP addresses, ports, protocols, etc. C. Then action: This specifies the action to take when traffic matches the rule. The primary action in APBR is:
routing-instance: This redirects the matching traffic to a specific routing instance, allowing you to steer traffic through different paths based on the application or URL category.
NEW QUESTION # 56
A company has acquired a new branch office that has the same address space as one of its local networks, 192.168.100.0/24. The offices need to communicate with each other. Which two NAT configurations will satisfy this requirement? (Choose two.)
- A. [edit security nat static]
user@OfficeA# show rule-set From-Office-B {
from interface ge-0/0/0.0;
rule 1 {
match {
destination-address 192.168.200.0/24;
}
then {
static-nat {
prefix { 192.168.100.0/24; }
}
}
}
} - B. [edit security nat source]
user@OfficeA# show rule-set OfficeBtoA {
from zone OfficeB;
to zone OfficeA;
rule 1 {
match {
source-address 192.168.210.0/24;
destination-address 192.168.200.0/24;
}
then {
source-nat { interface; }
}
}
} - C. [edit security nat static]
user@OfficeB# show rule-set From-Office-A {
from interface ge-0/0/0.0;
rule 1 {
match {
destination-address 192.168.210.0/24;
}
then {
static-nat {
prefix { 192.168.100.0/24; }
}
}
}
} - D. [edit security nat source]
user@OfficeB# show rule-set OfficeAtoB {
from zone OfficeA;
to zone OfficeB;
rule 1 {
match {
source-address 192.168.200.0/24;
destination-address 192.168.210.0/24;
}
then {
source-nat { interface; }
}
}
}
Answer: A,C
NEW QUESTION # 57
Exhibit:
In which mode is the SRX Series device?
- A. Ethernet switching
- B. Transparent
- C. Packet
- D. Mixed
Answer: B
Explanation:
The exhibit shows that theGlobal Modeof the SRX Series device is set to "Transparent bridge." This means the device is operating intransparent mode. In this mode, the SRX Series device acts like a Layer 2 bridge, forwarding traffic based on MAC addresses and not performing any Layer 3 (IP) routing or firewalling.
Intransparent mode, the SRX device is effectively invisible to the network at the IP layer, and it bridges traffic between Ethernet interfaces without needing to assign IP addresses to those interfaces. This mode is typically used when you want the SRX to act as a firewall without making any changes to the network's routing configuration.
Key Indicators from the Exhibit:
* Global Mode: Transparent bridge: This confirms that the device is configured in transparent mode.
* MAC learningandEthernet Switchingoptions are enabled, which aligns with transparent mode functionality where the device learns MAC addresses and switches traffic between VLANs.
Juniper Security Reference:
* Transparent Mode Overview: Transparent mode is used to deploy a firewall in Layer 2 mode, where it bridges traffic between VLANs without being an IP routing device. Reference: Juniper Networks Transparent Mode Documentation.
NEW QUESTION # 58
Exhibit
You configure Source NAT using a pool of addresses that are in the same subnet range as the external ge-0/0/0 interface on your vSRX device. Traffic that is exiting the internal network can reach external destinations, but the return traffic is being dropped by the service provider router.
Referring to the exhibit, what must be enabled on the vSRX device to solve this problem?
- A. STUN
- B. Proxy ARP
- C. Persistent NAT
- D. DNS Doctoring
Answer: D
NEW QUESTION # 59
You have noticed a high number of TCP-based attacks directed toward your primary edge device.
You are asked to configure the IDP feature on your SRX Series device to block this attack.
Which two IDP attack objects would you configure to solve this problem? (Choose two.)
- A. Signature
- B. host
- C. Protocol anomaly
- D. Network
Answer: A,C
NEW QUESTION # 60
You want to test how the device handles a theoretical session without generating traffic on the Junos security device.
Which command is used in this scenario?
- A. show security flow session
- B. show security policies
- C. show security match-policies
- D. request security policies check
Answer: D
Explanation:
The request security policies check command allows you to simulate a session through the SRX device, checking the security policy action that would apply without needing to send real traffic. This helps in validating configurations before actual deployment. For more details, see Juniper Security Policies Testing.
The commandrequest security policies checkis used to test how a Junos security device handles a theoretical session without generating actual traffic. This command is useful for validating how security policies would be applied to a session based on various parameters like source and destination addresses, application type, and more.
* Explanation of Answer A (request security policies check):
* This command allows you to simulate a session and verify which security policies would be applied to the session. It's a proactive method to test security policy configurations without the need to generate real traffic.
* Example usage:
bash
Copy code
request security policies check from-zone trust to-zone untrust source 10.1.1.1 destination 192.168.1.1 protocol tcp application junos-https Juniper Security Reference:
* Security Policies Check: This command provides a way to simulate and verify security policy behavior without actual traffic. Reference: Juniper Security Policy Documentation.
NEW QUESTION # 61
Exhibit.
A hub member of an ADVPN is not functioning correctly.
Referring the exhibit, which action should you take to solve the problem?
- A. [edit security]
user@hub-1# set ike gateway advpn-gateway advpn suggester disable - B. [edit interfaces]
root@vSRX-1# delete st0.0 multipoint - C. [edit interfaces]
user@hub-1# delete ipsec vpn advpn-vpn traffic-selector - D. [edit security]
user@hub-1# delete ike gateway advpn-gateway advpn partner
Answer: C
NEW QUESTION # 62
You have a multinode HA default mode deployment and the ICL is down. In this scenario, what are two ways that the SRX Series devices verify the activeness of their peers? (Choose two.)
- A. Each peer sends a probe with the virtual IP address as the source IP address and the upstream router as the destination IP address.
- B. Fabric link heartbeats are used to verify the activeness of the peers.
- C. Each peer sends a probe with the virtual IP address as the destination IP address.
- D. Custom IP addresses may be configured for the activeness probe.
Answer: A,D
NEW QUESTION # 63
You have configured the backup signal route IP for your multinode HA deployment, and the ICL link fails.
Which two statements are correct in this scenario? (Choose two.)
- A. The current active node retains the active role.
- B. The active node removes the active signal route.
- C. The backup node changes the routing preference to the other node at its medium priority.
- D. The active node keeps the active signal route.
Answer: A,C
Explanation:
Explanation:
NEW QUESTION # 64
You want to enable transparent mode on your SRX series device.
In this scenario, which three actions should you perform? (Choose three.)
- A. Ensure that no IRB interfaces are configured on the device.
- B. Enable the ethernet-switching family on your Layer 2 interfaces
- C. Reboot the SRX device.
- D. Add your Layer 2 interfaces to a security zone.
- E. Install a Layer 2 feature license.
Answer: B,C,D
NEW QUESTION # 65
You want to configure a threat prevention policy.
Which three profiles are configurable in this scenario? (Choose three.)
- A. C&C profile
- B. infected host profile
- C. SSL proxy profile
- D. malware profile
- E. device profile
Answer: A,B,D
NEW QUESTION # 66
Exhibit:
Host A shown in the exhibit is attempting to reach the Web1 webserver, but the connection is failing. Troubleshooting reveals that when Host A attempts to resolve the domain name of the server (web.acme.com), the request is resolved to the private address of the server rather than its public IP. Which feature would you configure on the SRX Series device to solve this issue?
- A. DNS doctoring
- B. Persistent NAT
- C. Double NAT
- D. STUN protocol
Answer: A
Explanation:
DNS doctoring modifies DNS responses for hosts behind NAT devices, allowing them to receive the correct public IP address for internal resources when queried from the public network. This prevents issues where private IPs are returned and are not reachable externally. For details, visit Juniper DNS Doctoring Documentation.
In this scenario, Host A is trying to resolve the domain name web.acme.com, but the DNS resolution returns the private IP address of the web server instead of its public IP. This is a common issue in networks where private addresses are used internally, but public addresses are required for external clients.
DNS doctoring is a feature that modifies DNS replies as they pass through the SRX device. In this case, DNS doctoring can be used to replace the private IP address returned in the DNS response with the correct public IP address for Host A. This allows external clients to reach internal resources without being aware of their private IP addresses.
NEW QUESTION # 67
Exhibit:
Host A shown in the exhibit is attempting to reach the Web1 webserver, but the connection is failing.
Troubleshooting reveals that when Host A attempts to resolve the domain name of the server (web.acme.
com), the request is resolved to the private address of the server rather than its public IP.
Which feature would you configure on the SRX Series device to solve this issue?
- A. DNS doctoring
- B. Persistent NAT
- C. Double NAT
- D. STUN protocol
Answer: A
Explanation:
DNS doctoring modifies DNS responses for hosts behind NAT devices, allowing them to receive the correct public IP address for internal resources when queried from the public network. This prevents issues where private IPs are returned and are not reachable externally. For details, visit Juniper DNS Doctoring Documentation.
In this scenario, Host A is trying to resolve the domain nameweb.acme.com, but the DNS resolution returns the private IP address of the web server instead of its public IP. This is a common issue in networks where private addresses are used internally, but public addresses are required for external clients.
* Explanation of Answer C (DNS Doctoring):
* DNS doctoringis a feature that modifies DNS replies as they pass through the SRX device. In this case, DNS doctoring can be used to replace the private IP address returned in the DNS response with the correct public IP address for Host A. This allows external clients to reach internal resources without being aware of their private IP addresses.
Configuration Example:
bash
Copy code
set security nat dns-doctoring from-zone untrust to-zone trust
Juniper Security Reference:
* DNS Doctoring Overview: DNS doctoring is used to modify DNS responses so that external clients can access internal resources using public IP addresses. Reference: Juniper DNS Doctoring Documentation.
NEW QUESTION # 68
You must setup a Ddos solution for your ISP. The solution must be agile and not block legitimate traffic.
Which two products will accomplish this task? (Choose two.)
- A. Corero Smartwall TDD
- B. Contrail Insights
- C. MX Series device
- D. SRX Series device
Answer: A,C
Explanation:
You must set up a DDoS solution for your ISP. The solution must be agile and not block legitimate traffic.
The two products that will accomplish this task are:
B) MX Series device. MX Series devices are high-performance routers that can provide DDoS protection at the network edge by integrating with Corero SmartWall Threat Defense Director (TDD) software. MX Series devices can leverage the packet processing capabilities of the MX-SPC3 Services Card to perform real-time DDoS detection and mitigation at line rate, scaling from 50 Gbps to 40 Tbps. MX Series devices can also use Juniper Networks Security Intelligence (SecIntel) to receive threat intelligence feeds from Juniper ATP Cloud or Juniper Threat Labs and apply them to the security policies.
MX Series devices can provide an agile and effective DDoS solution for your ISP without blocking legitimate traffic12.
C) Corero SmartWall TDD. Corero SmartWall TDD is a software solution that runs on MX Series devices and PTX Series devices to provide DDoS protection at the network edge. Corero SmartWall TDD uses behavioral analytics and detailed network visibility to detect and block DDoS attacks in seconds, without affecting the normal traffic. Corero SmartWall TDD can also provide advanced protection from "carpet bombing" attacks, 5G DDoS visibility, and multi-tenant portal for as-a-service offerings or views by department within an enterprise. Corero SmartWall TDD can provide an agile and effective DDoS solution for your ISP without blocking legitimate traffic34.
The other options are incorrect because:
A) Contrail Insights. Contrail Insights is a software solution that provides network analytics and visibility for cloud and data center environments. Contrail Insights can help you monitor, troubleshoot, and optimize the performance and security of your network, but it does not provide DDoS protection by itself.
Contrail Insights can integrate with other Juniper products, such as Contrail Enterprise Multicloud, Contrail Service Orchestration, and AppFormix, to provide a comprehensive network management solution, but it is not a DDoS solution for your ISP5.
D) SRX Series device. SRX Series devices are high-performance firewalls that can provide DDoS protection at the network perimeter by integrating with Juniper ATP Cloud and Juniper Threat Labs. SRX Series devices can use SecIntel to receive threat intelligence feeds from Juniper ATP Cloud or Juniper Threat Labs and apply them to the security policies. SRX Series devices can also use IDP to detect and prevent application-level attacks, such as SQL injection, cross-site scripting, and buffer overflow. SRX Series devices can provide a robust and effective DDoS solution for your network, but they are not designed to handle high-volume DDoS attacks at the network edge, as MX Series devices and Corero SmartWall TDD are.
Reference: Juniper and Corero Joint DDoS Protection Solution MX-SPC3 Services Card Overview Corero SmartWall Threat Defense Director (TDD) Juniper Networks and Corero: A Modern Approach to DDoS Protection at Scale Contrail Insights Overview
[SRX Series Services Gateways]
[Juniper Networks Security Intelligence (SecIntel)]
NEW QUESTION # 69
Exhibit
Referring to the exhibit, which statement is true?
- A. This custom block list feed will be used after the Juniper Seclntel block list feed.
- B. This custom block list feed will be used before the Juniper Seclntel
- C. This custom block list feed will be used instead of the Juniper Seclntel block list feed
- D. This custom block list feed cannot be saved if the Juniper Seclntel block list feed is configured.
Answer: A
NEW QUESTION # 70
You are deploying OSPF over IPsec with an SRX Series device and third-party device using GRE.
Which two statements are correct? (Choose two.)
- A. The GRE interface must be configured under the OSPF protocol.
- B. The OSPF protocol must be enabled under the VPN zone.
- C. Overlapping addresses are allowed between remote networks.
- D. The GRE interface should use lo0 as endpoints.
Answer: A,D
NEW QUESTION # 71
The exhibit shows part of the flow session logs.
Which two statements are true in this scenario? (Choose two.)
- A. Destination NAT occurs.
- B. The existing session is found in the table, and the fast path process begins.
- C. Junos captures a TCP packet from source address 172.20.101.10 destined to 10.0.1.129.
- D. This packet arrives on interface ge-0/0/4.0.
Answer: C,D
Explanation:
From the session log, we can derive the following:
* Packet arrives on ge-0/0/4.0 (Answer B): The log indicates that the incoming packet is being processed on the ge-0/0/4.0 interface, as seen in the output.
Example Log Analysis:
ruby
Copy code
CID-0:THREAD_ID-01:RT: chose interface ge-0/0/4.0 as incoming nat if.
* TCP Packet Captured (Answer C): The source of the packet is 172.20.101.10 and it is destined for
10.0.1.129 on port 22, as described in the log.
Example Log Analysis:
ruby
Copy code
CID-0:THREAD_ID-01:RT: CID-0:THREAD_ID-01:RT: flow_first_create_session...
sa 172.20.101.10, da 10.0.1.129, sp 59009, dp 22
These logs show the creation of a session for TCP traffic (likely SSH, based on port 22) between the source and destination addresses across the tunnel.
NEW QUESTION # 72
Exhibit
You are not able to ping the default gateway of 192.168 100 1 (or your network that is located on your SRX Series firewall.
Referring to the exhibit, which two commands would correct the configuration of your SRX Series device? (Choose two.)
- A.
- B.
- C.
- D.
Answer: B,D
NEW QUESTION # 73
Exhibit
Referring to the exhibit, which three statements are true? (Choose three.)
- A. The packet is dropped before making an SSH connection.
- B. The packet is allowed to make an SSH connection.
- C. The packet's destination is to a server in the DMZ zone.
- D. The packet's destination is to an interface on the SRX Series device.
- E. The packet originated within the Trust zone.
Answer: A,D,E
NEW QUESTION # 74
What are two valid modes for the Juniper ATP Appliance? (Choose two.)
- A. event collector
- B. all-in-one
- C. core
- D. flow collector
Answer: B,C
NEW QUESTION # 75
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