Enabling Cloudflare Proxy for AWS Lambda


Integrating Cloudflare with AWS Lambda can enhance security and performance. Here's a concise guide for technically proficient users to set up Cloudflare proxy for AWS Lambda.

Step 1: Deploy Your Lambda Function

Create and Deploy Lambda: Start by creating your Lambda function and deploying it to AWS.

Step 2: Configure API Gateway

Add API Gateway Trigger: Attach an API Gateway trigger to your Lambda function. This will manage HTTP requests to your function.

Step 3: DNS Configuration

Add CNAME Record: In your Cloudflare DNS settings, create a CNAME record. For instance, api.mydomain.com should point to your API Gateway URL, such as aaabbbccc.execute-api.ap-southeast-2.amazonaws.com.

Step 4: SSL/TLS Encryption

Enable Full Encryption Mode: Navigate to SSL/TLS settings on Cloudflare and select "Full" encryption mode. This ensures end-to-end encryption, necessary because Cloudflare requires SSL to communicate with AWS.

Step 5: Proxy Configuration

Ensure CNAME is Proxied: Verify that the CNAME record is proxied (indicated by an orange cloud icon).

Step 6: Origin Server Certificate

Create and Import Certificate: Generate an Origin Server certificate in Cloudflare under the SSL/TLS menu. Import the PEM format certificate into AWS Certificate Manager.

Step 7: API Gateway Custom Domain

Set Up Custom Domain Name: In API Gateway, create a custom domain name and select the certificate imported from AWS Certificate Manager.

Step 8: API Mappings

Configure API Mappings: Set up API mappings in the custom domain configuration to route requests to your Lambda function effectively.

Step 9: Testing

Test Your API: Use the following command to test your API endpoint:

curl 'https://api.mydomain.com/route' -X 'POST'

This setup will remove the default route prefix, providing a cleaner URL path.

By following these steps, you can successfully enable Cloudflare proxy for AWS Lambda, ensuring enhanced security and streamlined performance.

Troubleshooting

How to Fix a 403 Error When Using Cloudflare Proxy with AWS Lambda

If you encounter a 403 error, it usually indicates an issue with the custom domain mapping in AWS API Gateway. Ensure that your domain mappings are correctly configured to resolve this error.

Resolving a 521 Error When Using Cloudflare Proxy with AWS Lambda

A 521 error typically means that Full SSL mode is not enabled in Cloudflare. This causes Cloudflare to attempt HTTP connections to AWS instead of HTTPS. To fix this, ensure Full SSL mode is activated to maintain secure communication.


Comments

Post a Comment

Popular posts from this blog

MurMurHash3, an ultra fast hash algorithm for C# / .NET

Image
Finding good hash functions for larger data sets is always challenging. The well know hashes, such as MD5, SHA1, SHA256 are fairly slow with large data processing and their added extra functions (such as being cryptographic hashes) isn’t always required either. Performance and low collision rate on the other hand is very important, so many new hash functions were inverted in the past few years. One of the most notable ones is MurMurHash3, which is an improved version of its predecessor (v2). The new version can create both 32 bit and 128 bit hash values, making it suitable for a wide range of applications. 64 bit architecture The 32 bit hash isn’t too important for large amount of data matching, so I only worked with and tested the 128 bit version. The latter one is optimized for x86-64 architecture, giving amazing speeds for data processing. As a 128 bit value consists of two 64 integers, the processor is fairly good with working with such large hash values – they are not byte...
. . .

Read more »

Quick select algorithm - find the Kth element in a list in linear time

Image
Quick select algorithm (Hoare's selection algorithm) – select the Kth element or  the first K element  from a list in linear time Working with large datasets is always painful, especially when it needs to be displayed in a ‘human readable’ format. It is a very frequent task to display only the largest, newest, most expensive etc. items. While sorting the whole dataset definitely gives a correct result, it is much slower than it needs to be – it needs at least O(n*log(n)) time and an it often uses recursion for the sorting, so in practice it can be quite slow. The quick select algorithm can get the top K element from a list of N items in linear time, O(n), with a very reasonable multiplication factor. The quick select does not use recursion so the performance is great for even large datasets. Algorithm The idea of the quick select is quite simple: just like with quicksort, select a random element from the list, and place every item that is smaller to the first half o...
. . .

Read more »

ESP32 - send a push notification from the Arduino ESP32 device to your phone

Image
Sending a push notification to your phone from an event from an ESP32 is simple. What you'll need (if you are using a Mac for development): Arduino IDE Arduino for ESP32 Serial port simulator for ESP32 to upload your code to the board Wifi network IFTTT account IFTTT app on your phone Wifi network that your ESP32 board can access Architecture Create an IFTTT applet This should read something like this: If Maker Event "notification", then Send a notification from the IFTTT app Change the notification template Go to the settings of your new IFTTT applet and change the template to include "Value1", like this: Get your Webhook endpoint in IFTTT On your applet, click the triangle looking thing (webhook), then Settings, or simply go to this URL  https://ifttt.com/maker_webhooks/settings   Visit the private URL in your browser, replace the trigger name with "notification", so it reads like ...trigger/notification/ with/... and in the Value1 field type in a ...
. . .

Read more »