lambda.md

AWS Lambda

At the very beginning of the file that contains your handler, add the following line:

const protect = require("@aikidosec/firewall/lambda"); // <-- Include this before any other code or imports

const dependency = require("dependency");

exports.handler = protect(async (event, context) => {
  // <-- Wrap your handler with protect
  // ...
});

or ESM import style:

import protect from "@aikidosec/firewall/lambda";

// ...

Right now, we support the following triggers:

• Gateway API

• SQS (Simple Queue Service)

• If you're using a different trigger, please let us know.

That's it! Your AWS Lambda function is now protected by Zen.

If you want to see a full example, check our lambda sample app.

Blocking mode

By default, the firewall will run in non-blocking mode. When it detects an attack, the attack will be reported to Aikido and continue executing the call.

You can enable blocking mode by setting the environment variable AIKIDO_BLOCKING to true.

It's recommended to enable this on your staging environment for a considerable amount of time before enabling it on your production environment (e.g. one week).

Debug mode

If you need to debug the firewall, you can run your lambda with the environment variable AIKIDO_DEBUG set to true.

This will output debug information to the console (e.g. if the agent failed to start, no token was found, unsupported packages, ...).

Preventing prototype pollution

Zen can also protect your application against prototype pollution attacks.

Read Protect against prototype pollution to learn how to set it up.