CISA Protection of Information Assets Practice Question
During an audit of network security controls, the IS auditor reviews firewall rule sets and identifies a rule that allows any-to-any traffic from the internal network to the Internet. The rule has a business justification. What is the auditor's BEST recommendation?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement a more restrictive rule set based on specific IP addresses and ports
Overly permissive rules should be tightened to reduce risk; the auditor should recommend implementing more specific rules based on actual needs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Add an intrusion prevention system (IPS) to monitor the traffic
Why it's wrong here
IPS can help but does not replace the need for a properly restrictive firewall rule.
- ✗
Require all traffic to go through a proxy server
Why it's wrong here
A proxy is a separate control; the firewall rule itself should still be specific.
- ✓
Implement a more restrictive rule set based on specific IP addresses and ports
Why this is correct
This reduces the attack surface while meeting business needs.
- ✗
Accept the risk because there is a business justification
Why it's wrong here
Acceptance should be documented and approved by management, but the rule should still be reviewed for potential tighter restrictions.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CISA practice question is part of Courseiva's free ISACA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CISA exam.