20 Azure Firewall Interview Questions and Answers

As a network security solution, Azure Firewall is a critical component of any Azure environment. When interviewing for a position that involves Azure Firewall, it is important to be prepared to answer questions about its capabilities, features, and how it can be used to secure a network. In this article, we will review some of the most common Azure Firewall interview questions and provide tips on how to answer them.

Azure Firewall Interview Questions and Answers

Here are 20 commonly asked Azure Firewall interview questions and answers to prepare you for your interview:

1. What is Azure Firewall?

Azure Firewall is a cloud-based network security service that protects your Azure Virtual Network resources from attacks. Azure Firewall uses a dynamic filtering approach that automatically adapts to new threats, making it more effective than traditional firewalls.

2. What are some of the main features provided by Azure Firewall?

Azure Firewall provides a number of features to help secure your Azure resources, including:

-A stateful inspection firewall that filters traffic based on a number of criteria, including source and destination IP addresses, ports, and protocols.
-The ability to create network security groups that can be used to control traffic flow to and from your Azure resources.
-A web application firewall that can help protect your web applications from common attacks.
-Integration with Azure Monitor for logging and analytics.

3. Can you explain what a network security group is in context with Azure Firewall?

A network security group is a collection of security rules that can be applied to an Azure resource. Azure Firewall uses network security groups to control traffic to and from your virtual network. By creating a network security group and adding it to your Azure Firewall, you can control which traffic is allowed to reach your virtual network.

4. Why do you think it’s important to enable UDRs for Azure Firewall VNET traffic?

UDRs are important for Azure Firewall VNET traffic because they allow you to control the traffic that is allowed to flow in and out of your VNET. By creating UDRs, you can ensure that only the traffic that you want to allow is able to pass through your firewall. This can help to improve the security of your VNET and prevent unauthorized access.

5. Can you give me an example of how you would use Azure Firewall in your organization?

Azure Firewall can be used to protect your Azure Virtual Network resources. It provides network-level filtering and can be used to control traffic in and out of your VNet. Azure Firewall can also be used to monitor and log traffic flows, which can be helpful in troubleshooting and security investigations.

6. What types of applications and services does Azure Firewall support?

Azure Firewall supports a variety of applications and services, including web applications, virtual private networks (VPNs), and Azure Traffic Manager. It is a fully stateful firewall as a service that supports all major protocols, including TCP, UDP, and ICMP.

7. How can you test connectivity between Azure resources and on-premises networks?

You can use the Azure Firewall to test connectivity between Azure resources and on-premises networks. By creating a rule in the Azure Firewall, you can allow traffic to flow between the two networks.

8. Is there a way to export firewall logs from Azure Firewall?

Yes, Azure Firewall provides the ability to export firewall logs to a storage account, Event Hub, or Log Analytics workspace.

9. What are the different ways that Azure Firewall can be deployed?

Azure Firewall can be deployed in one of three ways: as a public cloud service, as a private cloud service, or as a hybrid cloud service. Each deployment option has its own advantages and disadvantages that should be considered before deciding which is right for your organization.

10. Is it possible to deploy multiple firewalls using a single deployment template? If yes, then how?

Yes, it is possible to deploy multiple firewalls using a single deployment template. You can do this by creating a nested template that deploys the individual firewalls.

11. How many supported regions are available for deploying Azure Firewall?

Azure Firewall is available in all public Azure regions except for China, Germany, and US Government.

12. What types of actions can be performed on Azure Firewall logs?

Azure Firewall logs can be used to monitor and analyze traffic patterns, diagnose issues, and generate reports. Actions that can be performed on the logs include filtering, searching, and exporting.

13. What is the difference between Network Watcher and Azure Firewall?

Azure Firewall is a managed, cloud-based network security service that protects your Azure Virtual Network resources. It is a fully stateful firewall as a service with built-in high availability and unrestricted cloud scalability. Network Watcher is a tool you can use to monitor and diagnose conditions at a network level in your Azure resources. It provides data collection and analysis features to help you understand how your network is performing.

14. What are some limitations of Azure Firewall?

Some potential limitations of Azure Firewall to keep in mind include:

– Azure Firewall can only be deployed in a virtual network
– Azure Firewall does not support filtering of traffic between subnets
– Azure Firewall does not support filtering of traffic destined for the virtual network gateway

15. Do you need any special skills or knowledge to configure and manage Azure Firewall?

You will need to be familiar with networking concepts and have a good understanding of Azure networking in order to configure and manage Azure Firewall. Additionally, it is helpful to have a basic understanding of firewall rules and how they work in order to properly configure Azure Firewall to meet your needs.

16. What are the advantages of using Azure Firewall over other cloud-based solutions like AWS WAF?

Azure Firewall provides a number of advantages over other cloud-based solutions, including:

– Azure Firewall is a managed service, so you don’t have to worry about patching or maintaining the firewall itself.
– Azure Firewall integrates with other Azure services like Azure Monitor and Azure Security Center for comprehensive security visibility and threat detection.
– Azure Firewall supports a wide range of features like application and network filtering, URL filtering, and more.

17. Can you describe the process of creating a new NSG rule set for Azure Firewall?

You can create a new NSG rule set for Azure Firewall by using the Azure portal, Azure PowerShell, or the Azure CLI. To create a new NSG rule set, you will first need to create a new NSG and then add the desired rules to the NSG. You can then apply the NSG to your Azure Firewall.

18. Where should I place my Azure Firewall instance within my topology?

The Azure Firewall should be placed as close to the internet gateway as possible, as it will be responsible for filtering all incoming traffic.

19. Is it possible to perform URL filtering with Azure Firewall? If yes, then how?

Yes, it is possible to perform URL filtering with Azure Firewall. You can do this by creating a URL filtering profile and assigning it to your firewall rule. The URL filtering profile will allow you to specify a list of URLs that should be allowed or blocked.

20. What type of information do you monitor when running Azure Firewall?

When running Azure Firewall, you will need to monitor a few different types of information in order to keep your network secure. This includes monitoring traffic flows, identifying suspicious activity, and keeping an eye on changes to your network configuration. By monitoring this information, you can help ensure that your Azure Firewall is able to effectively protect your network.