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NEW QUESTION # 124
Referring to the exhibit,
which statement about TLS 1.2 traffic is correct?
Answer: A
Explanation:
Explanation:
NEW QUESTION # 125
Referring to the exhibit, you have been assigned the user LogicalSYS1 credentials shown in the configuration.
In this scenario, which two statements are correct? (Choose two.)
Answer: B,D
NEW QUESTION # 126
Which two statements are true regarding NAT64? (Choose two.)
Answer: B,C
Explanation:
Comprehensive Detailed Step-by-Step Explanation with All Juniper Security References Understanding NAT64:
* NAT64 allows IPv6-only clients to communicate with IPv4 servers by translating IPv6 addresses to IPv4 addresses and vice versa.
* It is essential in environments where IPv6 clients need access to IPv4 resources.
Flow-Based vs. Packet-Based Forwarding Modes:
* Flow-Based Forwarding Mode:
* The SRX device processes packets based on the session state.
* Supports advanced services like NAT, IDP, and ALG.
* Packet-Based Forwarding Mode:
* The SRX device processes each packet individually without maintaining session state.
* Limited support for advanced services.
* Option A: An SRX Series device should be in flow-based forwarding mode for IPv4.
* True.
* NAT64 requires flow-based mode for IPv4 traffic to properly translate and maintain session states.
* Option B: An SRX Series device should be in packet-based forwarding mode for IPv4.
* False.
* Packet-based mode does not support NAT features.
* Option C: An SRX Series device should be in packet-based forwarding mode for IPv6.
* False.
* Similar to IPv4, NAT64 requires flow-based mode for IPv6 traffic.
* Option D: An SRX Series device should be in flow-based forwarding mode for IPv6.
* True.
* Flow-based mode is necessary for NAT64 to handle IPv6 traffic correctly.
Key Points:
* NAT64 Requires Flow-Based Mode:
* Both IPv4 and IPv6 interfaces involved in NAT64 must be configured in flow-based mode.
* This is because NAT64 relies on session information and stateful packet inspection.
* Packet-Based Mode Limitations:
* Does not support NAT, as it lacks session awareness.
* Not suitable for NAT64 operations.
Juniper Security References:
* Juniper Networks Documentation:
* "NAT64 is supported only in flow-based processing mode."
* Source: Configuring NAT64
* Understanding Flow-Based and Packet-Based Modes:
* "Flow-based mode is required for stateful services such as NAT."
* Source: Flow-Based and Packet-Based Processing
Conclusion:
* To implement NAT64 on an SRX Series device, both IPv4 and IPv6 traffic must be processed in flow- based forwarding mode.
* Therefore, Options A and D are the correct statements.
NEW QUESTION # 127
Exhibit:
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?
Answer: A
Explanation:
In the scenario described, you are configuring NAT64, which allows communication between IPv6 and IPv4 networks by translating IPv6 packets to IPv4 and vice versa. The configuration in the exhibit shows an attempt to translate traffic coming from the IPv6 address 2001:db8::1/128 and destined for the IPv4 address
10.10.201.10/32.
However, the issue here is related to the return traffic. For NAT64 to function correctly, you must ensure that the return traffic (from the IPv4 network) is translated back to the original IPv6 source address. Without proper translation of the return traffic, the communication will not be successful. In this case, you needsource NATto handle the return traffic correctly.
Detailed Solution:
* In NAT64, when traffic originates from an IPv6 network and is translated to IPv4, the return traffic from the IPv4 network must be translated back to the original IPv6 address usingsource NAT.
* The source NAT configuration must include translation for the return path from IPv4 to IPv6 to ensure bidirectional communication.
Configuration Example:
To resolve the issue, you can configure source NAT on the SRX device to handle the translation of the return traffic as follows:
* Configure Source NAT for Return Traffic:You need to configure source NAT on the interface handling the return traffic. This will translate the IPv4 address back to the IPv6 source address.
Example:
bash
Copy code
set security nat source rule-set ipv4-source-rule from zone untrust
set security nat source rule-set ipv4-source-rule to zone trust
set security nat source rule-set ipv4-source-rule rule source-nat-translation match source-address 10.10.201.10
/32
set security nat source rule-set ipv4-source-rule rule source-nat-translation then source-nat pool ipv6-source- pool
* Ensure Proper Routing and Security Policy Configuration:Make sure that both the IPv4 and IPv6 routes are correctly defined, and that security policies are allowing the return traffic through.
Use the following commands to verify the NAT and policy configurations:
bash
Copy code
show security nat source
show security policies
By configuring source NAT to translate the return traffic back to IPv6, the communication between the IPv6 host and the IPv4 server should now work correctly.
Juniper Security Reference:
* NAT64 Overview: This functionality allows IPv6 clients to communicate with IPv4-only servers. For successful translation, NAT64 requires both source NAT and destination NAT to handle the bidirectional traffic. Reference: Juniper Networks Documentation on NAT64.
NEW QUESTION # 128
Exhibit:
Referring to the exhibit, which two statements are true? (Choose two.)
Answer: B,C
Explanation:
The Local zone represents a Layer 2 segment, which allows for traffic flows within the same zone and across other zones with proper security policies. Additionally, hosts in different zones (such as Local and Trust) can communicate when policies are defined to allow such interactions. Refer to Juniper Security Policy Documentation for detailed guidance.
From the exhibit:
* IRB Interface Requirement (Answer B): To allow communication between the Trust and Untrust zones (Layer 2 and Layer 3 environments), anIRB (Integrated Routing and Bridging)interface is required. The IRB interface acts as a gateway between Layer 2 and Layer 3 domains.
Command Example:
bash
Copy code
set interfaces irb unit 0 family inet address 10.1.1.1/24
set security zones security-zone untrust interfaces irb.0
* Communication Between Local and Trust (Answer D): Hosts in the Local zone (Layer 2) can communicate with hosts in the Trust zone (Layer 3) if appropriate security policies are in place. A security policy is needed to define how traffic can flow between these zones.
Command Example:
bash
Copy code
set security policies from-zone local to-zone trust policy allow-local-trust match source-address any destination-address any application any set security policies from-zone local to-zone trust policy allow-local-trust then permit These configurations ensure proper communication between zones in a mixed Layer 2 and Layer
3environment.
NEW QUESTION # 129
......
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