What is the Use of Azure Service Bus in Databricks?

The Databricks control plane automatically creates a service bus to collect metrics and other data about your Databricks cluster's activity. This data is used to generate insights into the performance and health of your Databricks cluster. The Databricks cluster in the data plane does not need to create its own service bus because it can use the service bus that is created in the control plane. This allows the Databricks cluster to focus on its primary task of processing data. The service bus in the control plane is also used to collect data for Databricks Autoscaling. Databricks Autoscaling uses this data to automatically scale your Databricks cluster up or down based on demand.

We can view the data collected by the service bus in the Databricks UI. To do this, go to the Clusters page and click on the cluster that you want to view. Then, click on the Metrics tab.

Does Azure firewall Supports MAC address filtering?

The option to filter traffic based on MAC addresses is currently not available in Azure Firewall. There are a few reasons why Azure Firewall does not support MAC address based filtering. First of all, MAC addresses are not globally unique, which implies that the same MAC address may be shared by several devices connected to several networks. It is difficult to rely on MAC addresses for traffic identification and management because of their lack of uniqueness. Second, rather than being used for security, MAC addresses are typically used for network administration and device identification. However, there are several situations in which MAC address filtering might be useful. It could be used, for example, to allow traffic from specified devices to access resources that are designated or to prevent traffic from specific devices within your network. 

We can use Azure Network Security Group (NSG) in place of Azure Firewall if MAC address filtering is required. NSGs give deeper and more flexible network traffic management together with support for MAC address filtering.

Can Azure Firewall Filter the Traffic Over a Private Endpoint?

Traffic over a private endpoint bypasses Azure Firewall, hence can not be filtered. Azure Firewall cannot inspect and control traffic over private endpoints. Private endpoints are created in your virtual network (VNet) and provide private connectivity to Azure services without the need to expose the services to the public internet. Private endpoints use a private IP address from your VNet, and traffic between your VNet and the Azure service is routed over the Azure backbone network.

If there is a need to inspect and control traffic over a private endpoint, you can use a network virtual appliance (NVA). An NVA is a software-based networking device that can be deployed in your VNet to inspect and control traffic.

Here are some of the benefits of using a private endpoint :

• Improved security: Private endpoints help to improve the security by preventing unauthorized access.
• Reduced costs: Private endpoints can help to reduce your costs by eliminating the need to use public IP addresses for Azure services.
• Improved performance: Private endpoints can help to improve the performance by reducing latency and improving network reliability

Difference between private link and service endpoint in Azure ?

The key difference between Azure Private Link and Azure Service Endpoints is that Private Link brings the Azure service into your virtual network (VNet), while Service Endpoints route traffic to the Azure service over the Azure backbone network.

Private Link creates a private endpoint in your VNet, which is assigned a private IP address. This private endpoint is then mapped to a Private Link resource, which is a specific Azure service that supports Private Link access. Once the private endpoint is mapped to the Private Link resource, traffic from your VNet to the Azure service will flow over the private endpoint, bypassing the public internet.

Service Endpoints create a route from your VNet to the Azure service over the Azure backbone network. This means that traffic from your VNet to the Azure service will still flow over the public internet, but it will be routed through the Azure backbone network, which is a more secure and reliable path.

Here is a table summarizing the key differences between Private Link and Service Endpoints:

Feature	Private Link	Service Endpoints
Creates a private endpoint in your VNet	Yes	No
Maps the private endpoint to a Private Link resource	Yes	No
Traffic from your VNet to the Azure service flows over the private endpoint	Yes	No
Traffic from your VNet to the Azure service is routed over the Azure backbone network	Yes	Yes
Requires additional configuration steps	Yes	No

Which one to choose?

The best option for you will depend on your specific needs. If you need to ensure that traffic from your VNet to the Azure service is completely private and isolated from the public internet, then Private Link is the best option. If you need to improve the performance and reliability of traffic from your VNet to the Azure service, then Service Endpoints is a good option.

If you are not sure which option is right for you, you can contact Azure support for assistance.

Top competitors of Dynatrace

Dynatrace is a leading provider of observability solutions, but it faces stiff competition from a number of other vendors. Here is a look at some of top competitors of Dynatrace in 2023:

• AppDynamics is a Cisco-owned company that offers a variety of observability solutions, including APM, infrastructure monitoring, and DEM. AppDynamics is known for its strong focus on user experience and its ability to monitor complex applications.
• Datadog is a cloud-based observability platform that offers a wide range of features, including APM, infrastructure monitoring, log management, and security monitoring. Datadog is known for its ease of use and its scalability.
• New Relic is another well-known provider of observability solutions. New Relic offers a variety of features, including APM, infrastructure monitoring, and application monitoring. New Relic is known for its innovative features and its strong community support.
• Splunk is a leading provider of log management and analytics solutions. Splunk also offers a variety of observability solutions, including APM and infrastructure monitoring. Splunk is known for its powerful analytics capabilities and its ability to scale to handle large volumes of data.
• Sumo Logic is another leading provider of log management and analytics solutions. Sumo Logic also offers a variety of observability solutions, including APM and infrastructure monitoring. Sumo Logic is known for its ease of use and its ability to provide insights into machine data.

In addition to these well-established vendors, there are also a number of emerging players in the observability market. These include companies such as IBM Instana, Elastic Observability, and Moogsoft. These companies are offering innovative new solutions that are designed to meet the needs of modern organizations.

Which observability platform is right for you?

The best observability platform for your organization will depend on your specific needs. When choosing a platform, it is important to consider the following factors:

• The features you need: Make sure that the platform you choose offers all of the features that you need, such as APM, infrastructure monitoring, and DEM.
• The scale of your environment: Choose a platform that can scale to handle the volume of data that your environment generates.
• Your budget: Observability platforms can range in price from a few hundred dollars per month to several thousand dollars per month. Choose a platform that fits your budget.

Azure Application Gateway vs. Azure Web Application Firewall: A Comparison

Azure Application Gateway and Azure Web Application Firewall (WAF) are two popular services that can be used to protect and manage web traffic. However, there are some key differences between the two services.

Azure Application Gateway is a web traffic load balancer that can be used to distribute traffic across multiple web servers. It can also be used to route traffic based on the URL path, host header, or other criteria. Application Gateway also includes a web application firewall that can be used to protect your applications from common web attacks.

Azure Web Application Firewall is a dedicated web application firewall that can be used to protect your applications from a wide range of web attacks, including SQL injection, cross-site scripting, and denial-of-service attacks. WAF can be used to protect applications that are hosted on Azure, as well as applications that are hosted on other platforms.

Comparison table

Feature	Azure Application Gateway	Azure Web Application Firewall
Load balancing	Yes	No
Routing	Yes	No
Web application firewall	Yes	Yes
Dedicated WAF	No	Yes
Support for non-Azure applications	No	Yes

Which service is right for you?

If you need a load balancer and a web application firewall, then Azure Application Gateway is a good option. However, if you need a dedicated web application firewall that can protect applications that are hosted on Azure or other platforms, then Azure Web Application Firewall is a better option.

Example scenarios

Here are some example scenarios where you might use Azure Application Gateway or Azure Web Application Firewall:

• Azure Application Gateway:
  • You have a web application that is hosted on multiple web servers. You need to use a load balancer to distribute traffic across the servers and improve performance.
  • You have a web application that needs to be routed to different servers based on the URL path or host header.
  • You need to use a web application firewall to protect your web application from common web attacks.
• Azure Web Application Firewall:
  • You have a web application that is hosted on Azure or another platform. You need to protect your web application from a wide range of web attacks, including SQL injection, cross-site scripting, and denial-of-service attacks.
  • You need to comply with industry regulations that require you to implement a web application firewall.

Conclusion

Azure Application Gateway and Azure Web Application Firewall are both powerful services that can be used to protect and manage web traffic. The best service for you will depend on your specific needs.