Exam Question

What are two benefits of the sinkhole Internet Protocol (IP) address that DNS Security sends to the client in place of malicious IP addresses? (Choose two.)

A. It represents the remediation server that the client should visit for patching.
B. In situations where the internal DNS server is between the client and the firewall, it gives the firewall the ability to identify the clients who originated the query to the malicious domain.
C. The client communicates with it instead of the malicious IP address.
D. It will take over as the new DNS resolver for that client and prevent further DNS requests from occurring in the meantime.

Palo Alto Networks System Engineer Professional PSE – Strata certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Palo Alto Networks System Engineer Professional PSE – Strata exam and earn Palo Alto Networks System Engineer Professional PSE – Strata certification.

Correct Answer

C. The client communicates with it instead of the malicious IP address.
D. It will take over as the new DNS resolver for that client and prevent further DNS requests from occurring in the meantime.

Explanation 1

The correct answer is B and C. Here is why:

B. This is a benefit of the sinkhole IP address because it allows the firewall to track and report on which clients are infected by malware that tries to contact malicious domains. The firewall can also apply security policies based on the sinkhole IP address to block or alert on such traffic.

C. This is a benefit of the sinkhole IP address because it prevents the client from reaching the malicious IP address and potentially downloading more malware or leaking sensitive data. The sinkhole IP address also enables the firewall to detect and block any attempts by the malware to use other protocols or ports to bypass DNS security.

Explanation 2

The two benefits of the sinkhole Internet Protocol (IP) address that DNS Security sends to the client in place of malicious IP addresses are:

B. In situations where the internal DNS server is between the client and the firewall, it gives the firewall the ability to identify the clients who originated the query to the malicious domain.
C. The client communicates with it instead of the malicious IP address.

Explanation:

B. In situations where the internal DNS server is between the client and the firewall, it gives the firewall the ability to identify the clients who originated the query to the malicious domain:
When DNS Security detects a request for a malicious domain, it can respond with a sinkhole IP address instead of the actual malicious IP address. If the internal DNS server is configured to forward DNS queries to the firewall, the firewall can intercept the DNS queries and identify the specific clients within the network that originated the query to the malicious domain. This enables the security team to investigate and take appropriate action against those clients or devices, helping in identifying potential security threats and determining the scope of the incident.

C. The client communicates with it instead of the malicious IP address:
By providing the sinkhole IP address to the client in place of the malicious IP address, DNS Security ensures that the client communicates with the sinkhole IP address instead. This redirection prevents the client from accessing the actual malicious IP address and potentially becoming a victim of the malicious activity associated with that IP. The sinkhole IP address can be a controlled and monitored environment where security measures can be implemented to protect the client from any malicious activities.

Options A and D are incorrect:

A. It represents the remediation server that the client should visit for patching:
The sinkhole IP address does not represent the remediation server for patching. Instead, it acts as a redirection point to protect the client from accessing the actual malicious IP address.

D. It will take over as the new DNS resolver for that client and prevent further DNS requests from occurring in the meantime:
The sinkhole IP address does not take over as the new DNS resolver for the client. Its purpose is to redirect the client’s communication away from the malicious IP address and towards a controlled environment where further analysis and security measures can be implemented. It does not prevent further DNS requests from occurring but rather provides a secure alternative to accessing the malicious IP address.

Therefore, the two benefits of the sinkhole IP address in DNS Security are B and C.

Explanation 3

Two benefits of the sinkhole Internet Protocol (IP) address that DNS Security sends to the client in place of malicious IP addresses are:

B. In situations where the internal DNS server is between the client and the firewall, it gives the firewall the ability to identify the clients who originated the query to the malicious domain. This can help with malware detection and mitigation by isolating infected devices or networks.

C. The client communicates with it instead of the malicious IP address. This can help with blocking malware from receiving instructions and updating, as well as collecting and analyzing malware samples.

The other options are not correct because:

A. It represents the remediation server that the client should visit for patching. This is not a benefit of the sinkhole IP address, but a possible function of a different server that can be configured to receive traffic from the sinkhole IP address.

D. It will take over as the new DNS resolver for that client and prevent further DNS requests from occurring in the meantime. This is not a benefit of the sinkhole IP address, but a possible consequence of a misconfigured sinkhole that can cause DNS resolution failures.

Explanation 4

The sinkhole IP address that DNS Security sends to the client in place of malicious IP addresses has two benefits:

1. The client communicates with it instead of the malicious IP address.
2. In situations where the internal DNS server is between the client and the firewall, it gives the firewall the ability to identify the clients who originated the query to the malicious domain .

Explanation 5

Explanation 6

A sinkhole IP address is a fictitious IP address that the firewall uses to replace the malicious IP address in a DNS response. The benefits of using a sinkhole IP address are:

It allows the firewall to identify the infected hosts on the network that are trying to communicate with the malicious domain. The firewall can log and block the traffic from the infected hosts to the sinkhole IP address.

It prevents the infected hosts from reaching the malicious domain and potentially downloading more malware or exfiltrating data. The sinkhole IP address can be set to a loopback address, a local server, or a Palo Alto Networks server that provides a warning message.

Based on this information, I think the correct answers to your question are B and C.

Explanation 7

Explanation 8

The sinkhole IP address that DNS Security sends to the client in place of malicious IP addresses has two benefits:

• B. In situations where the internal DNS server is between the client and the firewall, it gives the firewall the ability to identify the clients who originated the query to the malicious domain.
• C. The client communicates with it instead of the malicious IP address.

The first benefit allows the firewall to track down the infected hosts on the network by looking at the traffic logs for any traffic sent to the sinkhole IP. The second benefit prevents the client from reaching the malicious domain and potentially downloading malware or leaking data.

Explanation 9

Explanation 10

The correct answers are B and C.

B: In situations where the internal DNS server is between the client and the firewall, it gives the firewall the ability to identify the clients who originated the query to the malicious domain.

When a sinkhole IP address is used, the client’s request to the malicious domain is redirected to a controlled IP address instead of the malicious IP address. This allows the firewall, which is monitoring the network traffic, to identify and track clients who are attempting to communicate with the malicious domain. This helps the network administrators to identify infected hosts on the protected network and take appropriate actions to remediate the issue.

C: The client communicates with it instead of the malicious IP address.

By sending the sinkhole IP address instead of the malicious IP address, the DNS Security service effectively disrupts the communication between the client and the malicious server. This helps to prevent the client from being compromised or further infected, as they are no longer able to access the malicious content or establish a connection with the malicious server.

In summary, the sinkhole IP address provided by DNS Security offers multiple benefits, primarily enabling the firewall to identify clients originating queries to malicious domains and preventing the clients from communicating with malicious IP addresses.

Reference

• Configure DNS Sinkholing (paloaltonetworks.com)
• LIVEcommunity – Cloudflare using 1.1.1.1 (Palo Alto recommended ipv4 DNS sinkhole IP) – LIVEcommunity – 208409 (paloaltonetworks.com)
• How to Configure DNS Sinkhole – Knowledge Base – Palo Alto Networks
• DNS sinkhole: A tool to help thwart cyberattacks – BlueCat Networks
• Understanding DNS sinkholes – A weapon against malware [updated 2021] | Infosec Resources (infosecinstitute.com)
• Configure the Sinkhole IP Address to a Local Server on Your Network (paloaltonetworks.com)

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