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Nertil Poci

Learn how to configure CORS for your APIs to secure your web applications by making sure only authorized client applications can consume them, adding an extra layer of security.

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Learn how to configure CORS for your APIs to secure your web applications by making sure only authorized client applications can consume them, adding an extra layer of security.

In this modern application era, applications that have the client and the server on the same origin are becoming less and less common. APIs are accessed from multiple clients hosted on different origins. In this course, Configuring CORS in ASP.NET and ASP.NET Core, you will learn how to setup CORS for your APIs so only approved client applications can access them. First, you will learn how browsers implement CORS. Next, you will discover how to configure your ASP.NET applications to allow CORS request to origins that you trust. Finally, you will explore the different CORS requests types and configuration options to help us secure and optimize requests coming in from other origins. By the end of this course, you will be able to identify CORS requests, configure CORS for your ASP.NET and ASP.NET Core applications.

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What's inside

Syllabus

Course Overview
Configuring CORS in ASP.NET Core Applications
Configuring CORS in ASP.NET Applications

Good to know

Know what's good
, what to watch for
, and possible dealbreakers
Appropriate for software developers who use ASP.NET and ASP.NET Core
Applies CORS concepts to secure APIs in modern, distributed applications
Led by Nertil Poci, an experienced instructor in web development
Prerequisites include foundational knowledge of ASP.NET and ASP.NET Core

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Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Configuring CORS in ASP.NET 2 and ASP.NET Core 2 with these activities:
Review CORS implementation
Reviewing CORS implementation can help you understand how CORS works and how to configure it in your ASP.NET applications.
Show steps
  • Read the course description and syllabus.
  • Review the lecture notes and video recordings.
  • Review the labs and assignments.
Review HTTP request and response concepts
Ensure a solid foundation by revisiting the fundamental concepts of HTTP requests and responses before delving into CORS.
Browse courses on HTTP
Show steps
  • Read up on HTTP request methods and their usage.
  • Review the structure of HTTP responses.
  • Explore the use of HTTP headers for data exchange.
Explore CORS documentation and tutorials
Enhance understanding by reviewing official CORS documentation and following additional tutorials to supplement the course material.
Browse courses on CORS
Show steps
  • Visit the MDN web docs on CORS.
  • Read up on the Fetch API and CORS.
  • Explore tutorials on CORS implementation in ASP.NET or ASP.NET Core.
Ten other activities
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Organize course materials and notes
Enhance comprehension and retention by organizing lecture notes, assignments, and other course materials to facilitate easy referencing and review.
Show steps
  • Create a digital or physical folder for the course.
  • Organize lecture notes according to topics.
  • File assignments, quizzes, and exams for future reference.
Review Browser Security Best Practices
Review best practices for browser security to ensure the protection of your web application.
Browse courses on Browser Security
Show steps
  • Identify common browser security threats
  • Review secure coding guidelines for web applications
  • Test your web application for vulnerabilities
Practice CORS request implementation
Practice implementing CORS requests using the techniques learned in the course to solidify understanding and reinforce concepts.
Browse courses on CORS
Show steps
  • Set up a simple HTTP server using Node.js or Python.
  • Implement CORS headers in your server responses.
  • Use a browser or curl to make CORS requests to your server.
  • Validate the CORS response headers.
Follow a tutorial on CORS for ASP.NET
Following a guided tutorial on CORS for ASP.NET can help you learn how to configure CORS in your applications.
Show steps
  • Search for a tutorial on CORS for ASP.NET.
  • Follow the steps in the tutorial.
  • Test your implementation.
Complete the CORS exercises in the Pluralsight course
Completing the CORS exercises in the Pluralsight course can help you practice configuring CORS in your ASP.NET applications.
Show steps
  • Open the Pluralsight course.
  • Complete the CORS exercises.
Write a blog post or article about CORS
Writing a blog post or article about CORS can help you synthesize your knowledge and share it with others.
Show steps
  • Choose a topic related to CORS.
  • Research the topic.
  • Write your blog post or article.
Build a sample web application with CORS
Create a practical project by building a web application that utilizes CORS, solidifying comprehension and fostering hands-on proficiency.
Browse courses on CORS
Show steps
  • Design the application's API and frontend.
  • Set up a development environment.
  • Implement CORS on the backend using ASP.NET or ASP.NET Core.
  • Develop the frontend to consume the API with CORS.
  • Test the application thoroughly.
Create a simple ASP.NET application that uses CORS
Creating a simple ASP.NET application that uses CORS can help you practice configuring CORS and see how it works in a real-world scenario.
Show steps
  • Create a new ASP.NET application.
  • Add a CORS policy to your application.
  • Create a controller and action that returns data.
  • Test your application by making a CORS request from another domain.
Mentor a junior developer on CORS
Mentoring a junior developer on CORS can help you reinforce your knowledge and identify areas where you need more practice.
Show steps
  • Find a junior developer who is interested in learning about CORS.
  • Create a mentorship plan.
  • Meet with the junior developer regularly to share your knowledge and experience.
Participate in a hackathon or coding challenge that involves CORS
Participating in a hackathon or coding challenge that involves CORS can help you apply your skills and knowledge in a competitive environment.
Show steps
  • Find a hackathon or coding challenge that involves CORS.
  • Register for the event.
  • Develop a solution to the challenge.

Career center

Learners who complete Configuring CORS in ASP.NET 2 and ASP.NET Core 2 will develop knowledge and skills that may be useful to these careers:
Data Security Analyst
Data Security Analysts are responsible for protecting an organization's data from unauthorized access, use, disclosure, disruption, modification, or destruction. One important aspect of data security is ensuring that data is only accessible to authorized users. By learning how to configure CORS, as you will in this course, Data Security Analysts can gain the skills and knowledge necessary to secure APIs and protect sensitive data from unauthorized access.
Security Engineer
Security Engineers are responsible for designing, implementing, and managing security solutions to protect an organization's computer systems and networks. By taking this course, Security Engineers can gain a deeper understanding of how to secure APIs by applying best practices like CORS. This knowledge can help Security Engineers to make informed decisions about how to protect applications from unauthorized access and data breaches.
Cybersecurity Analyst
Cybersecurity Analysts protect computer systems, networks, and data from unauthorized access, use, disclosure, disruption, modification, or destruction. By taking this course, Cybersecurity Analysts can learn how to configure CORS to secure APIs and protect web applications from security threats. This knowledge can help Cybersecurity Analysts to make informed decisions about how to protect applications from unauthorized access and data breaches.
Information Security Analyst
Information Security Analysts plan and implement security measures to protect an organization's computer networks and systems, including web applications. This course can help Information Security Analysts build a strong foundation in understanding how to secure APIs and other web application components from unauthorized access. By applying security best practices like CORS, you can protect applications from security threats and data breaches.
Full-Stack Developer
Full Stack Developers are responsible for both client and server side development. Understanding CORS is a vital skill for Full Stack Developers because it allows for secure communication between the client and server sides, which is especially essential when the client and server are hosted on different origins. Taking this course may inform many aspects of a career as a Full Stack Developer.
Cloud Engineer
Cloud Engineers design, build, and maintain cloud computing systems. They also ensure that cloud systems run smoothly and securely. By taking this course, Cloud Engineers can learn how to configure CORS to secure APIs and protect cloud applications from security threats. This knowledge can help Cloud Engineers to make informed decisions about how to protect applications from unauthorized access and data breaches.
Information Technology Manager
Information Technology Managers plan, implement, and manage computer systems and networks. They also ensure that systems and networks run smoothly and securely. By taking this course, Information Technology Managers can learn how to configure CORS to secure APIs and protect networks from unauthorized access. This knowledge can help Information Technology Managers to make informed decisions about how to protect applications from unauthorized access and data breaches.
Web Developer
One of the main functional areas of a Web Developer is to develop and maintain web applications, including their APIs. By learning how to configure CORS, as you will in this course, you will gain knowledge and skills applicable to many roles as a Web Developer. In particular, you'll be able to work on web applications in which the client and server are hosted on different origins, which is essential for modern web application development.
Data Analyst
Data Analysts collect, analyze, and interpret data to help organizations make informed decisions. They also develop and implement data security measures to protect data from unauthorized access and use. By taking this course, Data Analysts can learn how to configure CORS to secure APIs and protect data from unauthorized access.
Software Engineer
A Software Engineer designs, develops, and maintains applications. APIs, such as the ones you'll be securing in this course, are components of applications. As a Software Engineer, you'll be able to use the knowledge you gain from configuring CORS to build and maintain modern web applications in which client and server are not on the same origin. In fact, this is becoming more and more common in the industry, so much so that many companies use CORS in their applications. This course may help build a foundation for a successful career as a Software Engineer.
Computer Programmer
A Computer Programmer develops or modifies software applications and makes sure that they adhere to established standards. Knowledge in security, such as the appropriate use of CORS, is becoming increasingly essential for Computer Programmers as the industry shifts to more modern applications which often involve clients and servers on different origins. This course can provide a strong foundation for a career as a Computer Programmer.
Software Architect
Software Architects are involved in the design, development, and implementation of software applications, just like Software Engineers. As a Software Architect, knowledge of how to configure CORS can help you to make decisions about how to handle client and server communication and to build secure and reliable software applications. This course may be useful to those interested in a career as a Software Architect.
Systems Engineer
Systems Engineers design, build, and maintain computer systems. They also ensure that systems run smoothly and securely. By understanding how to configure CORS, as you will in this course, Systems Engineers can gain the skills and knowledge necessary to secure APIs and protect systems from unauthorized access.
Network Engineer
Network Engineers design, implement, and maintain computer networks. They also ensure that networks run smoothly and securely. By understanding how to configure CORS, as you will in this course, Network Engineers can gain the skills and knowledge necessary to secure APIs and protect networks from unauthorized access.
Business Analyst
Business Analysts work with stakeholders to define and document business requirements. They also develop and implement solutions to meet these requirements. By taking this course, Business Analysts can learn how to configure CORS to secure APIs and protect data from unauthorized access.

Reading list

We've selected seven books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in Configuring CORS in ASP.NET 2 and ASP.NET Core 2.
Provides a comprehensive guide to full-stack web development using ASP.NET Core 2 and Angular 6, including a section on CORS configuration. It offers practical examples and in-depth explanations, making it a valuable resource for this course.
Provides a comprehensive overview of web application security, including a section on CORS misconfigurations. It discusses potential vulnerabilities and offers practical advice on how to identify and mitigate them.
Provides a comprehensive guide to designing and documenting REST APIs, including best practices for CORS configuration. It offers practical advice and examples that can help you build secure and scalable APIs.
This cookbook contains a collection of recipes for common development tasks in ASP.NET Core 2.0, including one on configuring CORS. It offers practical solutions and code examples that can be easily adapted to your specific needs.
Comprehensive guide to CORS for developers. It covers everything from CORS basics to advanced topics such as CORS security.

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