Hello everybody,

I have installed a dedicated server for NGINX based on Ubuntu Core

I want to define this behavior

NGINX Server (Public IP) >>> listening on port 80 >>> redirect to a LAN Server on port 80 (http://mylocalserver/virtualhost1)
NGINX Server (Public IP) >>> listening on port 81 >>> redirect to a LAN Server on port 80 (http://mylocalserver/virtualhost2)

My local virtualhost on my backend server is reachable (ie: http://mylocalserver/virtualhost1)
but my second virtualhost is not reachable (ie: http://mylocalserver/virtualhost2)

it is like the network port is closed but my firewall is accepting the flow.

here is my configuration if you have any idea why my second virtualhost is not reachable

##NGINX.CONF##

user www-data;
worker_processes 2;
events {
worker_connections 19000;
}
worker_rlimit_nofile 40000;
http {

client_body_timeout 5s;
client_header_timeout 5s;
keepalive_timeout 75s;
send_timeout 15s;
gzip on;
gzip_disable "msie6";
gzip_http_version 1.1;
gzip_comp_level 5;
gzip_min_length 256;
gzip_proxied any;
gzip_vary on;
gzip_types
application/atom+xml
application/javascript
application/json
application/rss+xml
application/vnd.ms-fontobject
application/x-font-ttf
application/x-web-app-manifest+json
application/xhtml+xml
application/xml
font/opentype
image/svg+xml
image/x-icon
text/css
text/plain
text/x-component;

client_max_body_size 100k;
client_body_buffer_size 128k;
client_body_in_single_buffer on;
client_body_temp_path /var/nginx/client_body_temp;
client_header_buffer_size 1k;
large_client_header_buffers 4 4k;

include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
}

#PROXY.CONF#
proxy_redirect on;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_hide_header X-Powered-By;
proxy_intercept_errors on;
proxy_buffering on;


proxy_cache_key "$scheme://$host$request_uri";
proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=cache:10m inactive=7d max_size=700m;


#VIRTUALHOST 1
server {
listen 80;
server_name virtualhost1;
}

#VIRTUALHOST 2
server {
listen 81;
server_name virtualhost2;
}


Could you please help me regarding my issue,

Thanks so much,