PSE - Strata: Benefits of IP address that DNS Security sends to client in place of malicious IP addresses?

Table of Contents

Question
Answer
Explanation
Reference

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.

Answer

Explanation

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

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.

Reference

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