nginx refused to connect node app on ec2 instance - node.js

Question

i have simple nodejs app running on ec2 instance with nginx configs
when tried to access the app from browser it give me "ec2-18-223-0-201.us-east-2.compute.amazonaws.com refused to connect."
when trying to curl it from VM
using curl http://localhost:3000 it works correctly, however when trying curl http://127.0.0.1:3000 it give me this output
Found. Redirecting to https://127.0.0.1:3000/
here's my nginx configs
upstream test{
server 127.0.0.1:3000;
}
server {
listen 80;
server_name ec2-18-223-0-201.us-east-2.compute.amazonaws.com www.ec2-18-223-0-201.us-east-2.compute.amazonaws.com;
location / {
client_max_body_size 20M;
client_body_buffer_size 128k;
proxy_pass http://test;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
}

Answer 1

One thing that should be clear before the actual problem. Is there in redirect policy in node app that returns below output?
curl http://127.0.0.1:3000 it gives me this output
Found. Redirecting to https://127.0.0.1:3000/ because redirection is
expected from Nginx, not from node app.
But I am sure the problem is with Nginx not with Node app as it is able to respond on a local port 3000.
refused to connect to connect mean that the server not running at all or the port may disable from the firewall.
Two possible reasons:
The Port 80 is not allowed in Security Group of the instance so allow 80 in the security group of AWS instance.
The Nginx is not running. Check the log under tail -f /var/log/nginx/error.log and the reason might be the log name of the DNS in the sever section.
So therefor two Suggestion for Nginx config
update your Nginx config to support long DNS name
vim /etc/nginx/nginx.conf and add value under http section in the config
http {
server_names_hash_bucket_size 512;
....
}
2. Remove redundent name from the config, its not be the reason but you should remove server_name ec2-18-223-0-201.us-east-2.compute.amazonaws.com www.ec2-18-223-0-201.us-east-2.compute.amazonaws.com;