Question 1

Exhibit: https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/Juniper_JN0-637_Dumps/page_6_img_1.jpg You are configuring NAT64 on your SRX Series device. You have committed the configuration shown in the exhibit. Unfortunately, the communication with the 10.10.201.10 server is not working. You have verified that the interfaces, security zones, and security policies are all correctly configured. In this scenario, which action will solve this issue?

Accepted Answer

D

Explanation: :

Question 2

Exhibit: https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/Juniper_JN0-637_Dumps/page_60_img_1.jpg https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/Juniper_JN0-637_Dumps/page_61_img_1.jpg You are troubleshooting a new IPsec VPN that is configured between your corporate office and the RemoteSite1 SRX Series device. The VPN is not currently establishing. The RemoteSite1 device is being assigned an IP address on its gateway interface using DHCP. Which action will solve this problem?

Accepted Answer

D

Explanation: Aggressive mode is required when an IP address is dynamically assigned, such as through DHCP, as it allows for faster establishment with less identity verification. More details are available in Juniper IKE and IPsec Configuration Guide. The configuration shown in the exhibit highlights that the RemoteSite1 SRX Series device is using DHCP to obtain an IP address for its external interface (ge-0/0/2). This introduces a challenge in IPsec VPN configurations when the public IP address of the remote site is not static, as is the case here. Aggressive mode in IKE (Internet Key Exchange) is designed for situations where one or both peers have dynamically assigned IP addresses. In this scenario, aggressive mode allows the devices to exchange identifying information, such as hostnames, rather than relying on static IP addresses, which is necessary when the remote peer (RemoteSite1) has a dynamic IP from DHCP. Correct Action (D): Changing the IKE policy mode to aggressive will resolve the issue by allowing the two devices to establish the VPN even though one of them is using DHCP. In aggressive mode, the initiator can present its identity (hostname) during the initial handshake, enabling the VPN to be established successfully. Incorrect Options: Option A: Changing the external interface to st0.0 is incorrect because the st0 interface is used for the tunnel interface, not for the IKE negotiation. Option B: Changing to IKE version 2 would not resolve the dynamic IP issue directly, and IKEv1 works in this scenario. Option C: Changing the IKE proposal set to basic doesn't address the dynamic IP challenge in this scenario. Juniper Reference: Juniper IKE and VPN Documentation: Provides details on when to use aggressive mode, especially when a dynamic IP address is involved.

Question 3

You want to enable transparent mode on your SRX series device. In this scenario, which three actions should you perform? (Choose three.)

Accepted Answer

A, C, E

Explanation: :

Question 4

Exhibit: https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/Juniper_JN0-637_Dumps/page_25_img_1.jpg Referring to the exhibit, what do you use to dynamically secure traffic between the Azure and AWS clouds?

Accepted Answer

C

Explanation: Security tags facilitate dynamic traffic management between cloud environments like Azure and AWS. Tags allow flexible policies that respond to cloud-native events or resource changes, ensuring secure inter-cloud communication. For more information, see Juniper Cloud Security Tags. In the scenario depicted in the exhibit, where traffic needs to be dynamically secured between Azure and AWS clouds, the best method to achieve dynamic security is by using security tags in the security policies. Explanation of Answer C (Security Tags in Security Policies): Security tags allow dynamic enforcement of security policies based on metadata rather than static IP addresses or zones. This is crucial in cloud environments, where resources and IP addresses can change dynamically. Using security tags in the security policies, you can associate traffic flows with specific applications, services, or virtual machines, regardless of their underlying IP addresses or network locations. This ensures that security policies are automatically updated as cloud resources change. Juniper Security Reference: Dynamic Security with Security Tags: This feature allows you to dynamically secure cloud-based traffic using metadata and tags, ensuring that security policies remain effective even in dynamic environments. Reference: Juniper Security Tags Documentation.

Question 5

You have deployed a new site as shown in the exhibit. Hosts in the 10.10.10.0/24 network
must access the DB1 server. The DB1 server must also have internet access the DB1 server encrypted.
Which two configuration statements will be required as part of the configuration on SRX1 to satisfy
this requirement? (Choose two)

Accepted Answer

A, D

Explanation: :

Question 6

You configure two Ethernet interfaces on your SRX Series device as Layer 2 interfaces and add them
to the same VLAN. The SRX is using the default L2-learning setting. You do not add the interfaces to a
security zone.
Which two statements are true in this scenario? (Choose two.)

Accepted Answer

A, C

Explanation: When Ethernet interfaces are configured as Layer 2 and added to the same VLAN without being assigned to a security zone, they will not forward traffic by default. Additionally, because they are operating in a pure Layer 2 switching mode, they lack the capability to enforce stateful security policies. For further details, refer to Juniper Ethernet Switching Layer 2 Documentation. Explanation of Answer A (Unable to Apply Stateful Security Features): When two interfaces are configured as Layer 2 interfaces and belong to the same VLAN but are not assigned to any security zone, traffic switched between them is handled purely at Layer 2. Stateful security features, such as firewall policies, are applied at Layer 3, so traffic between these interfaces will not undergo any stateful inspection or firewalling by default. Explanation of Answer C (Interfaces Will Not Forward Traffic): In Junos, Layer 2 interfaces must be added to a security zone to allow traffic forwarding. Since the interfaces in this scenario are not part of a security zone, they will not forward traffic by default until assigned to a zone. This is a security measure to prevent unintended forwarding of traffic. Juniper Security Reference: Layer 2 Interface Configuration: Layer 2 interfaces must be properly assigned to security zones to enable traffic forwarding and apply security policies. Reference: Juniper Networks Layer 2 Interface Documentation.

Question 7

Exhibit: https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/Juniper_JN0-637_Dumps/page_12_img_1.jpg https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/Juniper_JN0-637_Dumps/page_13_img_1.jpg In which mode is the SRX Series device?

Accepted Answer

C

Explanation: :

Question 8

You have deployed an SRX Series device at your network edge to secure Internet-bound sessions for
your local hosts using source NAT. You want to ensure that your users are able to interact with
applications on the Internet that require more than one TCP session for the same application session.
Which two features would satisfy this requirement? (Choose two.)

Accepted Answer

A, C

Explanation: Address persistence ensures that the same NAT IP address is used for all sessions originating from a single source IP. Persistent NAT maintains connections for applications needing multiple sessions, like VoIP. Additional details are available in Juniper NAT Documentation. For applications that require multiple TCP sessions for the same application session (such as VoIP or certain online games), the SRX device needs to handle NAT properly to maintain session continuity. Here’s what helps: Address Persistence (Answer A): Address persistence ensures that multiple sessions initiated by the same internal host are mapped to the same external IP address. This is crucial for applications that use multiple TCP sessions to maintain a stateful connection with the external server. Command Example: bash set security nat source persistent-nat address-persistence Persistent NAT (Answer C): This feature allows the external server to initiate new connections to the internal client using the same NAT translation. It's essential for applications that require consistent NAT mappings across multiple sessions. Command Example: bash set security nat source persistent-nat permit target-host-port These features ensure that applications with multiple TCP sessions work seamlessly across NAT. Reference: Juniper NAT and persistent NAT documentation.

Question 9

You have deployed automated threat mitigation using Security Director with Policy Enforcer, Juniper
ATP Cloud, SRX Series devices, Forescout, and third-party switches.
In this scenario, which device is responsible for communicating directly to the third-party switches
when infected hosts need to be blocked?

Accepted Answer

B

Explanation: Policy Enforcer receives these policies and translates them into device-specific commands. It then communicates with the third-party switches (using protocols like SNMP, RADIUS, or vendor-specific APIs) to enforce those commands, such as blocking the infected hosts' MAC addresses or port access. Why Policy Enforcer is the Right Choice: Centralized Enforcement: Policy Enforcer acts as the central point of enforcement for Security Director policies, ensuring consistent security across the network. Multi-Vendor Support: It can interact with a wide range of network devices, including switches from different vendors. Automation: Policy Enforcer automates the policy enforcement process, enabling rapid response to threats. Reference: Forescout and Juniper integration for network access control.

Question 10

You want to bypass IDP for traffic destined to social media sites using APBR, but it is not working and IDP is dropping the session. What are two reasons for this problem? (Choose two.)

Accepted Answer

A, C

Explanation: Explanation of Answer A (Session Reclassification): APBR (Advanced Policy-Based Routing) requires the session to be classified based on the specified rule, which can change midstream as additional packets are processed. If the session was already established before the APBR rule took effect, the traffic may not be correctly reclassified to match the new APBR rule, leading to IDP (Intrusion Detection and Prevention) processing instead of being bypassed. This can occur especially when the session was already established before the rule change. Explanation of Answer C (Application Services Bypass): For APBR to work and bypass the IDP service, the application services bypass must be explicitly configured. Without this configuration, the APBR rule may redirect the traffic, but the IDP service will still inspect and potentially drop the traffic. This is especially important for traffic destined for specific sites like social media platforms where bypassing IDP is desired. Example configuration for bypassing IDP services: bash set security forwarding-options advanced-policy-based-routing profile application- services-bypass Step-by-Step Resolution: Reclassify the Session Midstream: If the traffic was already being processed before the APBR rule was applied, ensure that the session is reclassified by terminating the current session or ensuring the APBR rule is applied from the start. Command to clear the session: bash clear security flow session destination-prefix Configure Application Services Bypass: Ensure that the APBR rule includes the application services bypass configuration to properly bypass IDP or any other security services for traffic that should not be inspected. Example configuration: bash set security forwarding-options advanced-policy-based-routing profile application- services-bypass Juniper Security Reference: Session Reclassification in APBR: APBR requires reclassification of sessions in real-time to ensure midstream packets are processed by the correct rule. This is crucial when policies change dynamically or new rules are added. Application Services Bypass in APBR: This feature ensures that security services such as IDP are bypassed for traffic that matches specific APBR rules. This is essential for applications where performance is a priority and security inspection is not necessary.

Question 11

You are using ADVPN to deploy a hub-and-spoke VPN to connect your enterprise sites. Which two statements are true in this scenario? (Choose two.)

Accepted Answer

C, D

Explanation: :

Question 12

You want to deploy two vSRX instances in different public cloud providers to provide redundant
security services for your network. Layer 2 connectivity between the two vSRX instances is not
possible.
What would you configure on the vSRX instances to accomplish this task?

Accepted Answer

C

Explanation: :

Question 13

You are experiencing problem with your ADVPN tunnels getting established. The tunnel and egress interface are located in different zone. What are two reasons for these problems? (Choose two.)

Accepted Answer

A, B

Explanation: :

Question 14

You are deploying OSPF over IPsec with an SRX Series device and third-party device using GRE. Which two statements are correct? (Choose two.)

Accepted Answer

A, D

Explanation: Comprehensive Detailed Step-by-Step Explanation with All Juniper Security Reference Understanding the Scenario: Objective: Deploy OSPF over IPsec between an SRX Series device and a third-party device using GRE tunnels. Components Involved: GRE (Generic Routing Encapsulation): Encapsulates packets to allow routing protocols like OSPF to run over IPsec tunnels. IPsec: Provides security for the GRE tunnels. OSPF: Dynamic routing protocol used over the GRE tunnel. Option A: The GRE interface should use lo0 as endpoints. Using the loopback interface (lo0) as the source and destination endpoints for GRE tunnels is a common best practice. Advantages: Stability: Loopback interfaces are always up, ensuring the GRE tunnel remains operational even if physical interfaces fail. Reachability: Provides consistent endpoint IP addresses for GRE tunnels. Configuration: Assign IP addresses to lo0 interfaces on both devices. Configure GRE tunnels to use these lo0 IP addresses as source and destination. Reference: Juniper Networks Documentation: "Using loopback interfaces as GRE tunnel endpoints ensures stability and consistent reachability for routing protocols over GRE tunnels." Source: Configuring GRE Tunnels Option D: The GRE interface must be configured under the OSPF protocol. To run OSPF over the GRE tunnel, the GRE interface must be included in the OSPF configuration. Configuration Steps: Create GRE Interface: Example: set interfaces gr-0/0/0 unit 0 tunnel source tunnel destination Assign IP Address to GRE Interface: Example: set interfaces gr-0/0/0 unit 0 family inet address Include GRE Interface in OSPF: Example: set protocols ospf area interface gr-0/0/0.0 Result: OSPF will establish adjacencies over the GRE interface and exchange routing information. Reference: Juniper Networks Documentation: "To enable OSPF over GRE tunnels, you must include the GRE interfaces in the OSPF configuration." Source: OSPF over GRE Configuration Why Options B and C are Incorrect: Option B: The OSPF protocol must be enabled under the VPN zone. Since OSPF is running over the GRE tunnel, which is encapsulated over IPsec, the OSPF packets are encapsulated within GRE and IPsec. The SRX device does not need to allow OSPF in the security policies or enable OSPF under the VPN zone for GRE-encapsulated traffic. Security Policies: The GRE traffic (IP protocol 47) must be permitted through the security policies. OSPF runs inside the GRE tunnel and does not require additional configuration under the VPN zone. Reference: Juniper Networks Documentation: "When using GRE over IPsec, routing protocols run over GRE and do not require separate security policies for their control traffic." Source: Security Policies for GRE over IPsec Option C: Overlapping addresses are allowed between remote networks. Overlapping IP addresses can cause routing conflicts and are generally not recommended. In a GRE over IPsec scenario, overlapping addresses can lead to issues in routing protocol adjacency and data forwarding. Best Practice: Ensure unique IP addressing schemes between remote networks to prevent routing issues. Reference: Juniper Networks Documentation: "Overlapping IP address spaces can lead to routing ambiguities and should be avoided when configuring GRE tunnels." Source: Avoiding Overlapping IP Addresses Conclusion: Correct Answers: A and D Rationale: Option A is correct because using lo0 as endpoints for GRE provides stability and reliability. Option D is correct because the GRE interface must be included in the OSPF configuration to enable OSPF over the tunnel.

Question 15

You are attempting to ping the IP address that is assigned to the loopback interface on the SRX series device shown in the exhibit. https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/Juniper_JN0-637_Dumps/page_98_img_1.jpg What is causing this problem?

Accepted Answer

C

Explanation: :

Free Juniper JN0-637 Actual Exam Questions