The correct interpretation is that this Azure Firewall rule denies inbound traffic from IP 10.0.0.5 to any destination. This is because the rule explicitly sets the action to "Deny" and the direction to "Inbound," meaning any packet originating from source IP 10.0.0.5 and destined for any address within the firewall’s scope is blocked, regardless of port or protocol. On the Microsoft Security Operations Analyst SC-200 exam, this scenario tests your ability to read Azure Firewall policy rules deployed via Azure Policy, where a common trap is confusing the "Deny" action with "Allow" or misreading the direction as outbound. Remember that Azure Firewall rules are stateful and evaluate based on the rule collection priority, so an explicit deny for inbound traffic from a specific IP overrides any lower-priority allow rules. A helpful memory tip is "DIA" — Deny Inbound Always blocks the source, no matter the destination.
SC-200 Respond to security incidents Practice Question
This SC-200 practice question tests your understanding of respond to security incidents. 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.
Exhibit
Refer to the exhibit.
{
"properties": {
"displayName": "Block malicious IP",
"description": "Blocks traffic from known malicious IP addresses.",
"securityPolicy": {
"isEnabled": true,
"rules": [
{
"name": "BlockIP",
"priority": 100,
"sourceAddresses": ["10.0.0.5"],
"destinationAddresses": ["*"],
"access": "Deny",
"direction": "Inbound",
"protocol": "Any"
}
]
}
}
}
You are analyzing a firewall policy in Azure Firewall deployed via Azure Policy. What is the effect of this rule?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Denies inbound traffic from IP 10.0.0.5 to any destination.
Option B is correct because the rule denies inbound traffic from IP 10.0.0.5 to any destination. Option A is wrong because it denies, not allows. Option C is wrong because the direction is inbound. Option D is wrong because it blocks all traffic from that IP, not just specific ports.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Allows outbound traffic from any source to IP 10.0.0.5.
Why it's wrong here
Access is Deny and direction is inbound.
✗
Allows inbound traffic from IP 10.0.0.5 to any destination.
Why it's wrong here
Access is set to Deny, not Allow.
✓
Denies inbound traffic from IP 10.0.0.5 to any destination.
Why this is correct
The rule denies inbound traffic from the specified source IP.
Related concept
Static NAT maps one inside address to one outside address.
✗
Denies outbound traffic from any source to IP 10.0.0.5.
Why it's wrong here
Direction is inbound, not outbound.
Common exam traps
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.
Detailed technical explanation
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.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 SC-200 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SC-200 NAT questions on configuration and troubleshooting.
Respond to security incidents — This question tests Respond to security incidents — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Denies inbound traffic from IP 10.0.0.5 to any destination. — Option B is correct because the rule denies inbound traffic from IP 10.0.0.5 to any destination. Option A is wrong because it denies, not allows. Option C is wrong because the direction is inbound. Option D is wrong because it blocks all traffic from that IP, not just specific ports.
What should I do if I get this SC-200 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SC-200 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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