How to enable nginx proxy pass? - http

Question

I have an inner server that runs my application. This application runs on port 9001. I want people access this application through nginx which runs on an Ubuntu machine that runs on DMZ network.
I have built nginx from source with the options of sticky and SSL modules. It runs fine but does not do the proxy pass.
The DNS name for the outer IP of the server is: bd.com.tr and I want people to see the page http://bd.com.tr/public/control.xhtml when they enter bd.com.tr but even tough nginx redirects the root request to my desired path, the application does not show up.
My nginx.conf file is:
worker_processes 4;
error_log logs/error.log;
worker_rlimit_nofile 20480;
pid logs/nginx.pid;
events {
worker_connections 1900;
}
http {
include mime.types;
default_type application/octet-stream;
server_tokens off;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
keepalive_timeout 75;
rewrite_log on;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Ssl on;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_read_timeout 150;
server {
listen 80;
client_max_body_size 300M;
location = / {
rewrite ^ http://bd.com.tr/public/control.xhtml redirect;
}
location /public {
proxy_pass http://BACKEND_IP:9001;
}
}
}
What might I be missing?

Answer 1

It was a silly problem and I found it. The conf file is correct so you can use it if you want and the problem was; The port 9001 of the BACKEND_IP was not forwarded and thus nginx was not able to reach the inner service. After forwarding the port, it worked fine. I found the problem in error.log so if you encounter such problem please check error logs first :)