AWS HTTPS requests not working on EC2 Load Balancer

I have an EC2 instance which is running an NodeJS Web-app and I want to enable HTTPS traffic to my instance. I purchased a domain name from AWS and requested an SSL Certificate.

I have also created a Target group which should redirect the traffic to HTTP port 3000 because my node app is running on port 3000.

I created a Load Balancer which should Listen to the HTTPS traffic and redirect it to the Target group.

It seems to work fine but when I click on the DNS name to see whether it is working or not, I can't connect to the server. Do you know what might be the issue.

I have checked and my EC2 instance has opened HTTPS request, so that should't be the issue.

Your screenshot shows you use ACM and application load balancer so your ALB terminates SSL. If so make sure:

• Your load balancer has a security group allowing inbound 443 from internet and outbound 3000 to your EC2 instance
• Your EC2 instance hosting your node app has a security group allowing inbound 3000 from ALB

Traffic between ALB and instance is HTTP. SSL is terminated on the ALB, so after the ALB (inside your VPC) you're http only.