Ruby on Rails app with Nginx unreachable - ruby-on-rails

Question

I'm deploying my Ruby on Rails website on a remote server.
I put my code in /var/www/[websitename]
/opt/nginx/conf/nginx.conf is as follows:
worker_processes 1;
events {
worker_connections 1024;
}
http {
passenger_root /home/tamer/.rvm/gems/ruby-2.5.0#meraki/gems/passenger-5.2.0;
passenger_ruby /home/tamer/.rvm/gems/ruby-2.5.0#meraki/wrappers/ruby;
passenger_app_env development;
include mime.types;
default_type application/octet-stream;
#access_log logs/access.log main;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
server {
listen 80;
server_name http://[my external ip];
# Tell Nginx and Passenger where your app's 'public' directory is
root /var/www/[my directory]/public;
index index.html index.htm;
# Static assets are served from the mentioned root directory
location / {
# root /var/www/APPNAME/current;
# index index.html index.htm;
proxy_pass http://127.0.0.1:3000;
proxy_redirect off;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
# proxy_set_header X-Real-Port $server_port;
# proxy_set_header X-Real-Scheme $scheme;
proxy_set_header X-NginX-Proxy true;
}
Then, I ran rails s -b 127.0.0.1 -p 3000
The code runs perfectly in my terminal.
However, the browser gives me "This site can’t be reached".
I get the same result with passenger start -a 127.0.0.1 -p 3000
How can I fix this problem

Answer 1

It worked after running iptables -F and restarting my rails appllication.

Answer 2

NOTE
your are connecting to your passenger instance localhost:3000
you should be able to connect via http://localhost IE default port 80 I think this is what you desire.
listen 80; <- > proxy_pass http://127.0.0.1:3000;