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A company deploys Azure Firewall to inspect and control outbound traffic from a virtual network. The security team wants to allow outbound HTTPS traffic only to specific FQDNs such as *.microsoft.com and *.windowsupdate.com, while blocking all other outbound internet access. Which type of rule should they configure in Azure Firewall to achieve this filtering?

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A company deploys Azure Firewall to inspect and control outbound traffic from a virtual network. The security team wants to allow outbound HTTPS traffic only to specific FQDNs such as *.microsoft.com and *.windowsupdate.com, while blocking all other outbound internet access. Which type of rule should they configure in Azure Firewall to achieve this filtering?

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Answer choices

Why each option matters

Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.

A

Distractor review

Network Rule

Network rules filter traffic based on IP addresses, ports, and protocols, not FQDNs. They cannot restrict outbound traffic to specific domain names.

B

Best answer

Application Rule

Application rules are designed to filter outbound traffic based on FQDNs, making them the correct choice for allowing traffic only to specific domains like *.microsoft.com.

C

Distractor review

NAT Rule

NAT rules are used for inbound destination network address translation, not for outbound traffic filtering based on domain names.

D

Distractor review

DNAT Rule

DNAT rules are a type of NAT rule used for inbound traffic translation and do not apply to outbound filtering or FQDN-based rules.

Common exam trap

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Technical deep dive

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

  • Static NAT maps one inside address to one outside address.
  • PAT allows many inside hosts to share one public address using ports.
  • Inside local and inside global describe the private and translated addresses.
  • NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

  • Identify inside and outside interfaces first.
  • Check whether the scenario needs static NAT, dynamic NAT or PAT.
  • Do not confuse NAT matching ACLs with normal packet-filtering intent.

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More questions from this exam

Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.

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Question 2

A public web application should be protected from OWASP-style attacks and network-layer DDoS attacks. Which two Azure services are most relevant?

Question 3

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Question 4

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Question 5

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Question 6

A SOC wants a Sentinel rule to include account, host, and IP entities so analysts can pivot during investigation. What should be configured in the analytics rule?

FAQ

Questions learners often ask

What does this AZ-500 question test?

Static NAT maps one inside address to one outside address.

What is the correct answer to this question?

The correct answer is: Application Rule — Azure Firewall uses Application Rules to filter traffic based on fully qualified domain names (FQDNs). Network Rules are for Layer 3/4 filtering based on IP addresses and ports, and do not support domain name filtering. NAT Rules are for inbound destination network address translation, and DNAT rules are for inbound destination network address translation. Therefore, to allow outbound HTTPS to specific FQDNs, you must configure an Application Rule that includes the target FQDNs and the protocol/port (e.g., https:443).

What should I do if I get this AZ-500 question wrong?

Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.

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