An IS auditor discovered that a firewall has more services than needed.
The IS auditor's FIRST recommendation should be to:
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A. B. C. D.C.
The correct answer is C. Review Configurations.
Explanation: Firewalls are critical security components used to protect networks by controlling traffic flow between different networks. They work by enforcing access control policies and can be configured to allow or block specific types of traffic based on defined rules.
In this scenario, the IS auditor discovered that the firewall has more services than needed. This means that the firewall is allowing unnecessary traffic, which could potentially pose a security risk to the network. The IS auditor's first recommendation should be to review the configurations to identify which services are not needed and can be disabled.
Option A, ensuring logging is turned on, is a good practice but not the first recommendation in this scenario. Logging can help identify and investigate security incidents, but it does not address the issue of unnecessary services.
Option B, deploying a network penetration team, is not relevant in this scenario. A penetration test is a simulated attack on a network to identify vulnerabilities and assess the effectiveness of security controls. However, this is not necessary when the issue is already identified, and the focus should be on fixing it.
Option D, eliminating services except for HTTPS, is not the first recommendation. While it may be a good practice to limit services to only those that are necessary, this should be done after reviewing the configurations and identifying which services are not needed.
Therefore, the correct answer is C, review configurations, which should be the first recommendation in this scenario. Once unnecessary services are identified, they can be disabled to reduce the attack surface and improve the security of the network.