AWS load balancer non-www to www

amazon ec2amazon-elbamazon-web-services

I want to redirect all traffic non-www to www (without using route53).
I have already created the CNAME www.

How can I do that without changing the code on the site?

The AWS application load balancer is on top of the infrastructure.

Best Answer

This would not be done via DNS or at the load balancer this is achieved at the webserver by issuing a redirect. With apache this is best done on in the .htaccess file in the webroot.

The contents of .htaccess should be as follows:

RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]

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Can’t access AWS ec2 instance behind elastic load balancer

If the status check is returning a 401, AWS sees the instance as unhealthy and takes it out of the ELB. Since you have no healthy instances, the ELB is down.

Note that AWS accesses /heartbeat.php via IP, not via DNS name. Check the response using curl -I http://<your instance IP>/heartbeat.php and adjust your server config if it's not being served by the default virtualhost.

How to redirect HTTP to HTTPS on AWS Application Load Balancer

You can add the below listed configuration to your .htaccess file. But before that make sure mod_rewrite is enabled on server and .htaccess file is not denied.

RewriteEngine On
RewriteCond %{HTTP:X-Forwarded-Proto} =http
RewriteRule . https://%{HTTP:Host}%{REQUEST_URI} [L,R=permanent]

For detailed explanation kindly go through the official documentation from aws end. https://aws.amazon.com/premiumsupport/knowledge-center/redirect-http-https-elb/

Best Answer

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How to redirect HTTP to HTTPS on AWS Application Load Balancer

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