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How to Configure Security for Azure Application Service Plan



Troy Hulbert


October 02, 2022



Azure Security Benchmark is a set of guidelines for securing web apps on Azure. The material is set according to the security rules described by the Azure Security Benchmark and the appropriate App Service advice.

Microsoft Defender for Cloud may be a maneuver to observe this security baseline and its recommendations. The Microsoft Defender for Cloud’s Regulatory Compliance section shows Azure Policy definitions.

When a feature includes relevant Azure Policy Definitions, they are higher in this baseline to assist with measuring compliance with Azure Security Benchmark controls and recommendations. Specific security circumstances may need a premium Microsoft Defender plan formal by specific recommendations.

Do not keep application secrets in your code or configuration files, such as database credentials, API tokens, and private keys. The typical method is to access them as environment variables following the standard pattern for your programming language. In-App Service, environment variables are reciting using app settings (especially for .NET applications and connection strings). Azure encrypts app settings and connection strings before injecting them into your app’s process memory during app startup. The encryption keys are frequently reconditioned.

A web apps two components must be fortified: incoming and outgoing traffic. Inbound traffic consists of users visiting your website or customers submitting API queries. Outbound traffic occurs when a web apps initiates a call to a database, cache, message queue, or another service. The incoming traffic is routed via a load balancer to a collection of shared front-end servers before reaching the workers on which your secure web-based applications are carried. The outgoing traffic exits these workers and passes via one of the scale unit’s outbound load balancers.

Security for Azure App Service can also come in handy while developing web apps on Azure. It is a popular PaaS solution that helps ease the deployment and hosting of web apps. It is impressive how it offers load balancing, auto-scaling, and SSL encryption without requiring underlying infrastructure management.

Security for Azure App Service also supports Azure Functions, an Azure service that enables you to construct serverless apps by concentrating on the unique function code. You may define triggers so that code is only executed when necessary and interaction with other Azure services is more straightforward.

The following sections explain how it secures web-based applications from additional dangers.

Security Measures

Azure Security Center visibility into security vulnerabilities with your Azure workloads and clear recommendations for resolving them. The agent-based detection of critical security vulnerabilities inside Azure Virtual Network machines and cloud resources surpasses agentless solutions in other clouds. This software may even be extended to handle on-premises workloads.

Using Azure Security Centre Just-in-Time VM access, you may shield your Azure Virtual Network machine management ports against brute-force assaults. This week at RSA, we are announcing numerous new capabilities for Azure Security Center, including enhanced protection for servers with Windows Defender ATP integration. An improved management dashboard experience to assist with assessing compliance across multiple subscriptions. The ability to configure security easily within the context of the Azure Virtual Network machine experience.

It is easy to enhance your organization’s security posture using Azure’s comprehensive security services for identity, networking, data, threat prevention, and security management. You may also expand your current investments to Azure by using the many partner security solutions available in the Azure Marketplace from businesses like Barracuda, Palo Alto, and Check Point.

Acquire a Custom Domain with HTTPS

When a web apps is found using Azure App Service, a subdomain of azurewebsites.net is communal. If the app’s name is Demo, the URL is demo.azurewebsites.net. Azure allows HTTPS with a wildcard certificate for the *.azurewebsites.net domain by default. There are many security concerns as a result. For instance, A phishing assault may be readily carried out by constructing securing web apps and domain names that seem identical. For instance, an attacker might build the malicious web application demo1.azurewebsites.net, similar to the legal name demo.azurewebsites.net. Because the web application is handed out to a subdomain of azurewebsites.net, the name of the malicious application is deceptively similar to the original name until one checks very carefully.

If the DNS record for *.azurewebsites.net is incorrect, or DNS cache poisoning occurs, the application will have a negative impact

The wildcard certificate causes the developer additional difficulties since they must guarantee that the route and domain of cookies are of an appropriate amount.

Microsoft has authority over the certificate. Thus, the developer relies on Microsoft for certificate-related problems, such as expiry, solid or weak signing methods, trustworthy or untrusted certificate signing authority, or certificates that are not self-signed. Because the certificate is a wild card, financial applications prefer that extensive validation of certificates cannot be imposed.

Cloud Security Position Administration (CSPM)

As previously said, cloud security is a shared obligation between the client and the cloud provider, such as AWS, Azure, or Google. Users are responsible for safeguarding their cloud-based apps and infrastructure configurations and settings, while the cloud provider is responsible for the security of the cloud itself.

Cloud providers are responsible for safeguarding the underlying infrastructure, which includes the hardware, software, networking, and facilities. A client’s AWS Cloud services decide the customer’s security responsibilities.

Cloud customers must configure their own guest operating systems, databases, and applications. They should focus on network traffic security, operating system and firewall setup, application security, patching, identity, and access management, and, most importantly, customer data security.

Web Application Security Firewall

Azure Application Gateway and Azure Front Door may become handy to terminate (HTTP/HTTPS) connections and distribute load among backend servers.

Secure web-based applications gateway is a localized service, whereas Front Door is a worldwide service. This implies that Azure Front Door allows you to configure, control, and monitor the worldwide routing of your web traffic (across regions), but Azure Application Gateway only functions in a single region.

Using the Azure Application Gateway, if the infrastructure is frame-up in the United States, a user from Japan would send their traffic via the public Internet to the data centre in the United States infrastructure is present in the United States.

Azure Front Door is a software-defined networking-based worldwide service. The SSL certificate and configuration are cohesive to Microsoft’s global edge locations.

In this instance, the user from Japan connects to their local Microsoft edge location in Japan, and the traffic traverses the Microsoft backbone network to the backend resources. With optional caching of static material at the edge — thus, the user experience should be much quicker.

You may utilize Azure Front Door for global load balancing and Application Gateway for regional load balancing.


Identity Protection employs adaptive machine learning techniques and heuristics to identify abnormalities and risk detections. This may suggest a compromised identity. Using this information, Identity Protection creates reports and warnings so that you may evaluate these risk detections. Also, take the necessary corrective and mitigating measures.

Azure Active Directory Identity Protection is more than just a tool for monitoring and reporting. Identity Protection computes a user risk rating for each user based on risk detections. You may automatically establish risk-based rules to safeguard your business’s identity.

In addition to existing Conditional Access restrictions offered by Azure Active Directory and EMS. These risk-based rules may automatically prohibit or provide corrective measures like password resets and multi-factor authentication enforcement.

Azure Active Directory Identity Protection is more than just a tool for monitoring and reporting. To secure your company’s identity, you may establish risk-based rules that react automatically when a specific risk threshold is attained in conjunction with other Conditional Access restrictions offered by Azure Active Directory and EMS. These rules may automatically block or trigger adaptive remedial steps, such as password resets and multi-factor authentication enforcement.


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