I cannot reach my website with certain subdomain (I use elasticbean stalk)

Hello Nico

It seems like you have set up your Elastic Beanstalk environments and Route 53 records for your website correctly for the most part. The fact that subdomains like "api" work while "www" does not suggests there might be an issue with your Route 53 configuration or the way you've configured your Elastic Beanstalk environments.

Here are some steps to troubleshoot the issue:

1. Route 53 Configuration:

   • Double-check your Route 53 records for the "www" subdomain. Ensure that you have a CNAME record pointing to the correct Elastic Beanstalk environment URL. It should look something like this:

     Name: www.mySite.com
     Type: CNAME
     Value: YourElasticBeanstalkEnvironmentURL
     

   • Ensure that the TTL (Time to Live) for the record is set to a reasonable value, such as 300 seconds.

2. Elastic Beanstalk Environment Configuration:

   • Check the security group settings for your Elastic Beanstalk environments. Ensure that they allow incoming traffic on the ports your application is using (typically, HTTP on port 80 or HTTPS on port 443). Make sure the security group associated with your instances allows traffic from the internet.

   • Verify that your Elastic Beanstalk application and environment are running and healthy. You can do this through the AWS Management Console or by using the AWS CLI.

3. SSL Certificate Configuration:

   • Ensure that your SSL certificate is correctly associated with your Elastic Beanstalk environments, including both "www" and "api" subdomains.

4. CloudWatch Logs and Elastic Beanstalk Logs:

   • Check the CloudWatch logs and Elastic Beanstalk logs for any errors or issues that might be preventing requests from reaching your instances. This can help you diagnose issues with your application or the environment.

5. DNS Propagation:

   • DNS changes can take some time to propagate across the internet. If you recently made changes to your Route 53 records, wait for some time (usually a few minutes to a few hours) to allow DNS changes to propagate fully.

6. Browser Cache:

   • Clear your browser cache or try accessing the site from a different browser or an incognito/private browsing window to rule out any local caching issues.

7. Network Issues:

   • Check if there are any network issues or firewalls that might be blocking traffic from certain subdomains. This could be happening at your end or your ISP's end.

8. Elastic Beanstalk Environment URL:

   • Ensure that the Elastic Beanstalk environment URLs are correctly configured in your Route 53 records. Make sure there are no typos or inconsistencies.

By following these steps, you should be able to identify and resolve the issue preventing your website from being accessible via the "www" subdomain. If the issue persists, consider consulting AWS support.

Please give a thumbs up if it helps