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NEW QUESTION # 523
While troubleshooting a firewall configuration, a technician determines that a "deny any" policy should be added to the bottom of the ACL. The technician updates the policy, but the new policy causes several company servers to become unreachable.
Which of the following actions would prevent this issue?
Answer: C
Explanation:
A firewall policy is a set of rules that defines what traffic is allowed or denied on a network. A firewall policy should be carefully designed and tested before being implemented, as a misconfigured policy can cause network disruptions or security breaches. A common best practice is to test the policy in a non-production environment, such as a lab or a simulation, before enabling the policy in the production network. This way, the technician can verify the functionality and performance of the policy, and identify and resolve any issues or conflicts, without affecting the live network. Testing the policy in a non-production environment would prevent the issue of the 'deny any' policy causing several company servers to become unreachable, as the technician would be able to detect and correct the problem before applying the policy to the production network.
Documenting the new policy in a change request and submitting the request to change management is a good practice, but it would not prevent the issue by itself. Change management is a process that ensures that any changes to the network are authorized, documented, and communicated, but it does not guarantee that the changes are error-free or functional. The technician still needs to test the policy before implementing it.
Disabling any intrusion prevention signatures on the 'deny any' policy prior to enabling the new policy would not prevent the issue, and it could reduce the security of the network. Intrusion prevention signatures are patterns that identify malicious or unwanted traffic, and allow the firewall to block or alert on such traffic.
Disabling these signatures would make the firewall less effective in detecting and preventing attacks, and it would not affect the reachability of the company servers.
Including an 'allow any' policy above the 'deny any' policy would not prevent the issue, and it would render the 'deny any' policy useless. A firewall policy is processed from top to bottom, and the first matching rule is applied. An 'allow any' policy would match any traffic and allow it to pass through the firewall, regardless of the source, destination, or protocol. This would negate the purpose of the 'deny any' policy, which is to block any traffic that does not match any of the previous rules. Moreover, an 'allow any' policy would create a security risk, as it would allow any unauthorized or malicious traffic to enter or exit the network. References = CompTIA Security+ SY0-701 Certification StudyGuide, page 204-205; Professor Messer's CompTIA SY0-701 Security+ Training Course, video 2.1 - Network Security Devices, 8:00 - 10:00.
NEW QUESTION # 524
A company prevented direct access from the database administrators' workstations to the network segment that contains database servers. Which of the following should a database administrator use to access the database servers?
Answer: B
Explanation:
Explanation
A jump server is a device or virtual machine that acts as an intermediary between a user's workstation and a remote network segment. A jump server can be used to securely access servers or devices that are not directly reachable from the user's workstation, such as database servers. A jump server can also provide audit logs and access control for the remote connections. A jump server is also known as a jump box or a jump host12.
RADIUS is a protocol for authentication, authorization, and accounting of network access. RADIUS is not a device or a method to access remote servers, but rather a way to verify the identity and permissions of users or devices that request network access34.
HSM is an acronym for Hardware Security Module, which is a physical device that provides secure storage and generation of cryptographic keys. HSMs are used to protect sensitive data and applications, such as digital signatures, encryption, and authentication. HSMs are not used to access remote servers, but rather to enhance the security of the data and applications that reside on them5 .
A load balancer is a device or software that distributes network traffic across multiple servers or devices, based on criteria such as availability, performance, or capacity. A load balancer can improve the scalability, reliability, and efficiency of network services, such as web servers, application servers, or database servers. A load balancer is not used to access remote servers, but rather to optimize the delivery of the services that run on them . References =
* How to access a remote server using a jump host
* Jump server
* RADIUS
* Remote Authentication Dial-In User Service (RADIUS)
* Hardware Security Module (HSM)
* [What is an HSM?]
* [Load balancing (computing)]
* [What is Load Balancing?]
NEW QUESTION # 525
A few weeks after deploying additional email servers, a company begins to receive complaints from employees that messages they send are going into their recipients' spam folders. Which of the following needs to be updated in order to resolve this issue?
Answer: C
Explanation:
An SPF (Sender Policy Framework) record needs to be updated to include the new email servers, allowing recipient systems to verify the legitimacy of the sending servers and prevent outgoing emails from being marked as spam.
NEW QUESTION # 526
Which of the following best describe a penetration test that resembles an actual external attach?
Answer: D
Explanation:
An unknown environment in penetration testing, also known as a black-box test, simulates an actual external attack where the tester has no prior knowledge of the system. This type of penetration test is designed to mimic real-world attack scenarios, where an attacker has little to no information about the target environment. The tester must rely on various reconnaissance and attack techniques to uncover vulnerabilities, much like a real-world attacker would. This approach helps organizations understand their security posture from an external perspective, providing insights into how their defenses would hold up against a true outsider threat.
Reference =
CompTIA Security+ SY0-701 Course Content: The course highlights the importance of understanding different penetration testing environments, including black-box testing, which aligns with the "unknown environment" in the provided answer.
CompTIA Security+ SY0-601 Study Guide: The guide details penetration testing methodologies, including black-box testing, which is crucial for simulating real external attack.
NEW QUESTION # 527
A company processes a large volume of business-to-business transactions and prioritizes data confidentiality over transaction availability. The company's firewall administrator must configure a new hardware-based firewall to replace the current one. Which of the following should the administrator do to best align with the company requirements in case a security event occurs?
Answer: A
Explanation:
The best answer is A. Ensure the firewall data plane moves to fail-closed mode.
The key detail in this question is that the company prioritizes data confidentiality over transaction availability.
In Security+ terms, when confidentiality is more important than keeping traffic flowing during a failure or security event, the preferred behavior is fail closed.
A fail-closed firewall blocks traffic if the device experiences a fault, failure, or security issue. This protects sensitive business data from being exposed or passed through an untrusted state. Even though this may interrupt business transactions, it aligns with the organization's priority of protecting confidential information.
Why the other options are incorrect:
B). Implement a deny-all rule as the last firewall ACL rule.This is a standard firewall best practice, but it does not specifically address what should happen in case a security event occurs.
C). Prioritize business-critical application traffic through the firewall.This focuses on availability and performance, not confidentiality.
D). Configure rate limiting between the firewall interfaces.Rate limiting may help with traffic control or DoS reduction, but it does not best address the requirement to prioritize confidentiality during a security event.
From the SY0-701 perspective, when asked to choose between keeping systems available and preventing unauthorized access or data exposure, fail closed is the best security-focused answer.
NEW QUESTION # 528
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