Tutorials

API Firewall Protection Overview

42Crunch API Firewall Protection

In previous tutorials, we have covered static analysis with the API security audit, dynamic testing with conformance scan – now it’s time to discuss protection.

Protection Overview

The Protection function is real-time protection of live APIs. You put our API firewall in the line of traffic. It’s an extremely efficient piece of software that we ship as a docker image. It’s been written in C, is highly optimized, less than 20 megabytes in size and has a sub-millisecond overhead.

When put in the line of traffic, our API Firewall uses your secure OpenAPI definition as an allowlist and policies. Essentially, it enforces the contract on all the API calls and all the responses (data coming in, data going out). Therefore, no call with get to your code if it’s outside of your contract, and no response will get sent back if it’s not expected.

To enable Protection, first click on Protect API.

Generating a Token

Next step is to generate a token. (1) Click on Protection Tokens > (2) Create Token > (3) Enter a name > (4) Click Generate Token. (screen shot of naming).

You then copy the token. Once you copy the token and close out the window there is no way to get the token for security reasons.

Deployment Docs

You will then need to configure your network to pass all the API calls and responses through the 42Crunch API Firewall. Click on Deploy Your APIs to follow the proper documentation related to your current deployment.

Navigating the Report

All actual security issues are scored based on the risk involved. The greater the risk, the higher the score (priority). You can filter issues by priority or category, or view all found issues as a list. You can also search for specific issues both in ‘All Issues’ and in each individual category.

You can immediately start fixing issues from the priority list, or click into individual issues and remediate from there. Clicking on Go to Issue takes you to the place in your code where the issue occurs and shows you a description and remediation recommendations.

Watch the 42Crunch API Firewall in Action

Check out the demo below to see our API micro-firewall in action!

Next Tutorial: We'll review protection dashboard reports and troubleshooting issues
View Tutorial

Resources

Want to learn more? Here are some resources to help you out!

Free Tools

Looking to make OpenAPI / Swagger editing easier in VS Code? Or want to check how secure your API is? Check out our free tools.

Get Started

API Security Top 10

Are you protected from the OWASP API Security Top 10? 42Crunch can help with that! We also have a free cheat sheet you can download.

Learn More

API Sec Encyclopedia

Information on the risks, guidelines, and fixes relating to the OpenAPI Specification. Both OAS v2 and v3 are available!

Learn More

Ready to Get Started?

Developer-first solution for delivering API security as code.