The correct solution is to configure Azure Firewall with threat intelligence-based filtering and route all outbound traffic through it. This works because Azure Firewall acts as a centralized, stateful network firewall that can inspect every outbound packet, log all traffic to a storage or analytics destination, and leverage Microsoft’s threat intelligence feeds to dynamically block connections to known malicious IP addresses and domains. On the Microsoft Azure Security Engineer Associate AZ-500 exam, this scenario tests your understanding of how to combine network segmentation with security controls—specifically, the difference between a full firewall and simpler tools like NSGs. A common trap is to choose Network Security Groups, but NSGs lack threat intelligence filtering and centralized logging for all outbound flows. Remember the mnemonic “FIRE” for Firewall Inspects, Routes, and Eliminates threats—if you need threat intelligence and logging, always pick Azure Firewall over NSGs or inbound-only services.
AZ-500 Secure networking Practice Question
This AZ-500 practice question tests your understanding of secure networking. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You need to secure outbound traffic from an Azure virtual network to the internet. All outbound traffic must be inspected by a firewall and logged. You also need to ensure that traffic to known malicious IP addresses is blocked. Which solution should you implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure Azure Firewall with threat intelligence-based filtering and route all outbound traffic through it.
Option A is correct because Azure Firewall provides outbound traffic inspection, logging, and threat intelligence-based filtering to block known malicious IPs. Option B is wrong because NSGs do not have threat intelligence filtering and are not designed for centralized logging of all outbound traffic. Option C is wrong because Azure Front Door is for inbound HTTP/HTTPS traffic. Option D is wrong because Azure DDoS Protection is for inbound volumetric attacks.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use Network Security Groups (NSGs) with default outbound deny rules.
Why it's wrong here
NSGs lack threat intelligence and centralized logging for outbound traffic.
✗
Deploy Azure Front Door with WAF policy.
Why it's wrong here
Front Door is for inbound traffic, not outbound.
✗
Enable Azure DDoS Protection on the virtual network.
Why it's wrong here
DDoS Protection is for inbound attacks.
✓
Configure Azure Firewall with threat intelligence-based filtering and route all outbound traffic through it.
Why this is correct
Azure Firewall can inspect, log, and block malicious outbound traffic based on threat intelligence.
Related concept
Standard ACLs match source addresses.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-500 question in full detail.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related AZ-500 ACL questions on filtering logic and placement.
Secure networking — This question tests Secure networking — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Configure Azure Firewall with threat intelligence-based filtering and route all outbound traffic through it. — Option A is correct because Azure Firewall provides outbound traffic inspection, logging, and threat intelligence-based filtering to block known malicious IPs. Option B is wrong because NSGs do not have threat intelligence filtering and are not designed for centralized logging of all outbound traffic. Option C is wrong because Azure Front Door is for inbound HTTP/HTTPS traffic. Option D is wrong because Azure DDoS Protection is for inbound volumetric attacks.
What should I do if I get this AZ-500 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related AZ-500 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. You have an Azure subscription with multiple virtual networks. You need to centrally manage and enforce security policies for all outbound traffic from virtual machines to the internet. The solution must be able to inspect traffic and log all connections. What should you deploy?
medium
✓ A.Azure Firewall in a hub virtual network.
B.Network security groups (NSGs) on all subnets.
C.Azure Application Gateway with WAF.
D.Azure VPN Gateway with forced tunneling.
Why A: Option B is correct because Azure Firewall provides centralized outbound traffic management, inspection, and logging. NSGs don't inspect traffic, and Application Gateway is for inbound web traffic. VPN gateway is for site-to-site connectivity.
Last reviewed: Jun 20, 2026
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