Certified Information Systems Auditor (CISA) — Question 215

Which of the following weaknesses would have the GREATEST impact on the effective operation of a perimeter firewall?

Answer options

• A. Ad hoc monitoring of firewall activity
• B. Use of stateful firewalls with default configuration
• C. Potential back doors to the firewall software
• D. Misconfiguration of the firewall rules

Correct answer: D

Explanation

Misconfiguration of the firewall rules can lead to unauthorized access or the blocking of legitimate traffic, significantly disrupting the firewall's effectiveness. While the other options present potential issues, they do not pose as immediate and critical a threat to the firewall's operational integrity as misconfigured rules do.