Error in accessing Public IPv4 addresses of the EC2 instances and ALB DNS from the AWS Console

Hello Team,

I have an AWS Free Tier account. By following the Onboarding to AWS guide (https://aws.amazon.com/getting-started/onboarding-to-aws/), I created two EC2 instances and one ALB. However, I am encountering the following issues:

EC2 Instance Issues:

When I try to open or access the Public IPv4 addresses of the instances from the AWS Console, the page attempts to load but fails with the error: "This site can’t be reached. 54.234.104.18 took too long to respond." This happens for both the EC2 instances. However, when I RDP into the EC2 instances and try to access their Public IPv4 addresses from within, they open without any issues. The Security Configuration for the EC2 instances is as follows:

ALB Issue:

After creating the ALB and Target Groups, following the same AWS Onboarding link, when I try to access the ALB DNS name by copying and pasting it into a browser, I receive an error, "This site can’t be reached. my-alb-1801654594.us-east-1.elb.amazonaws.com took too long to respond."

Could someone kindly help me debug and resolve these issues?

Regards, Subhasish