Connecting AWS ELB to EC2 with SSL

An ELB (load balancer) is a device that load balances and distributes requests, but AWS allows the ELB to be SSL-enabled for HTTPS communication.

This makes it possible to use HTTPS for Apache on EC2. To be precise, HTTPS is used up to the ELB, and HTTP is used between the ELB and EC2.

Before “adding listeners” to the load balancer created at “https://confrage.jp/en/connect-to-aws-ec2-via-elb-alb/“, first release port 443 of the load balancer’s security group.

Port 80 should also be released at one point.

This is so that you can see the Apache Welcome page even if you access it via “http://http://elb.xxx.co.uk/”.

If you do not want to show the http exit, you can remove port 80.

Next, in order to SSL-enable port 443 of the load balancer, you will need an ACM (in the same region as the ELB).

Since EC2 is located in Ohio, ACM will also be created in Ohio.

The domain name of the certificate should be “elb.xxx.co.uk”.

Perform DNS validation and verify that the CNAME is added by Route53.

After confirming that it is “issued,” finally add a listener.

The target group specifies which port of the EC2 between ELB and EC2 is to be released. Here, port 80 is released.

This completes the setup.

Please visit http://elb.xxx.co.uk/でもhttps://elb.xxx.co.uk/でもEC2のApacheのWelcomeページにアクセス出来ることが確認できます.