Book Image

Azure Serverless Computing Cookbook - Third Edition

By : Praveen Kumar Sreeram
Book Image

Azure Serverless Computing Cookbook - Third Edition

By: Praveen Kumar Sreeram

Overview of this book

This third edition of Azure Serverless Computing Cookbook guides you through the development of a basic back-end web API that performs simple operations, helping you understand how to persist data in Azure Storage services. You'll cover the integration of Azure Functions with other cloud services, such as notifications (SendGrid and Twilio), Cognitive Services (computer vision), and Logic Apps, to build simple workflow-based applications. With the help of this book, you'll be able to leverage Visual Studio tools to develop, build, test, and deploy Azure functions quickly. It also covers a variety of tools and methods for testing the functionality of Azure functions locally in the developer's workstation and in the cloud environment. Once you're familiar with the core features, you'll explore advanced concepts such as durable functions, starting with a "hello world" example, and learn about the scalable bulk upload use case, which uses durable function patterns, function chaining, and fan-out/fan-in. By the end of this Azure book, you'll have gained the knowledge and practical experience needed to be able to create and deploy Azure applications on serverless architectures efficiently.
Table of Contents (14 chapters)
13
Index

Configuring additional security using IP whitelisting

In this recipe, you'll learn a technique to secure and restrict access to your Azure functions only to those clients whose IP addresses are whitelisted.

Let's say you want to restrict the function app's access to the internal organization alone, as it will be used only by the users' apps hosted internally within the organization's network. To do this, you need to whitelist one or more IP addresses (or IP address ranges) to allow access to the Azure function app.

In the recipe, we are going to create access restriction rules. Rules are nothing but instructions on whether to allow or block access based on IP addresses, IP address ranges, and even virtual networks.

Getting ready…

Please create the following services if they are not created already:

  • A function app
  • An HTTP trigger function

How to do it…

In this section, you'll learn how to implement the whitelisting...