AWS instance connection refused

Question

I have created amazon EC2 instance and able to SSH also using below command

ssh -i Ec2CHD5.pem [email protected]

When I try to ping c2-xx-xx-xxx-xxx.ap-southeast-1.compute.amazonaws.com I am able to do so also.

But when try to curl curl http://c2-xx-xx-xxx-xxx.ap-southeast-1.compute.amazonaws.com I am getting connection refused, am I missing any step or guidelines?

Could somebody guide me to troubleshoot.

Answer 1

Probably your server running on the aws instance is only listening to localhost or 127.0.0.1, thus it will ignore connections from the outside. try listening to 0.0.0.0

Answer 2

In my case the problem was not in aws, but in the http service I started. My http service was a node express app. In the listen command I had to pass '0.0.0.0' as the listening server, NOT '127.0.0.1'

http.createServer( .... ).listen(80, '0.0.0.0');

On aws side, this is the usual checklist :

1. public ip address enabled for your instance
2. security group should have proper inbound rules
3. subnet associated to your instance, should have proper Network ACL & Route table.

For these three steps on aws side, you can refer this page : https://aws.amazon.com/premiumsupport/knowledge-center/instance-vpc-troubleshoot/