212-89 Web Application Incidents Practice Question
An attacker is using a specific User-Agent to scan your web application. How do you block them effectively?
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
✓
Create a WAF rule to block requests with the specific User-Agent string
Creating a WAF rule to drop requests matching that specific User-Agent string is the most direct and efficient mitigation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Create a WAF rule to block requests with the specific User-Agent string
Why this is correct
Most WAFs allow filtering based on HTTP request headers like User-Agent.
- ✗
Disable all directory indexing on the server
Why it's wrong here
This is a hardening measure, but it does not stop the scanning behavior.
- ✗
Change the web server listening port
Why it's wrong here
Port changes are security through obscurity and do not stop the attack.
- ✗
Update the server's hosts file
Why it's wrong here
The hosts file maps domains to IPs, not User-Agents.
About these practice questions
One of 206 original 212-89 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official EC-Council exam blueprint
This 212-89 practice question is part of Courseiva's free EC-Council 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 212-89 exam.