Azure Security Center: introduction to the solution

Azure Security Center is a cloud solution that helps prevent, detect and respond to security threats that affect the resources and workloads on hybrid environments. This article lists the main characteristics and features, to address the use cases and to understand the potential of the instrument.

Key features and characteristics of Azure Security Center

  • It manages security policies centrally. It ensures compliance with the safety requirements to be imposed on business and regulatory. Everything is handled centrally through security policies that can be applied to different workloads.

Figure 1 – Policy & Compliance Overview

Figure 2 – Policy management

  • It makes Security Assessment. It monitors the situation continuously in terms of security of machines, networks, storage and applications, in order to identify potential security problems.
  • It provides recommendations that you can implement. Are given indications that are recommended to implement to fix the security vulnerabilities that affect your environment, before they can be exploited in potential cyber attacks.

Figure 3 – Recommendations list

  • It assigns priorities to warnings and possible security incidents. Through this prioritization you can focus first on the security threats that may impact more on the infrastructure.

Figure 4 – Assigning severity for each report

Figure 5 – Assigning severity for each potential security incident detected

  • It allows to configure your cloud environment in order to protect it effectively. It is made available a simple method, quickly and securely to allowjust-in-time access to system management ports and applications running on the VM, by applying adaptive controls.

Figure 6 – Enabling Just-in-time VM access

  • It provides a fully integrated security solution. Allows you to collect, investigate and analyze security data from different sources, including the ability to integrate with third-party solution.

Figure 7 – Integration with other security solutions

 

The Cost of the Solution

Security Center is offered in two different tiers:

  • Free tier. In this tier Azure Security Center is completely free and provides visibility into security of resources residing only in Azure. Among the features offered there are: basic security policy, security requirements and integration with third-party security products and services.
  • Standard tier. Compared to tier free adds enhanced threat detection (including threat intelligence), behavioral analysis, anomaly detection and security incidents and reports of conferral of threats. The tier standard extends the visibility on the security of the resources that reside on-premises, and hybrid workloads. Through machine learning techniques and having the ability to create whitelist it allows to block malware and unwanted applications.

Figure 8 – Comparison of features between the available pricing tiers

For the Standard tier, you can try it for free for 60 days after that, if you want to continue using the solution, you have a monthly fee for single node. For more information on costs of the solution you can access to the official page of costs.

Figure 9 – Standard tier upgrade screen

To take advantage of all the Security Center features is necessary to apply the Standard Tier to the subscribtion or to the resource group that contains the virtual machines. Configuring the tier Standard does not automatically enable all features, but some of these require specific configurations, for example VM just in time, adaptive control of applications and network detection for resources in Azure.

 

Basic principles of operation

The collection of security data from systems, regardless of their location, is via the Microsoft Monitoring Agent, that it provides to its sending to a Log Analytics workspace. Security Center requires a workspace on which you enabled the following solution according to tier chosen:

  • Free tier: the Security Center enables the solution SecurityCenterFree.
  • Standard tier: the Security Center enables the solution Security. If in the workspace is already installed the solution Security & Auditit is used and nothing else is installed.

To save the data collected from the Security Center you can use a Log Analytics workspace created by default or select a specific one associated with the relative Azure subscription.

Figure 10 – Configuration of the workspace of Log Analytics where you collect the data

Conclusions

Azure Security Center is an appropriate, mature and structured solution to meet the security requirements for cloud, on-premises, or hybrid environments. Thanks to several features covered provides the knowledge that Microsoft has matured in the management of its services, combining it with powerful new technologies, as machine learning and big data, to treat and manage consciously and effectively the security.