Edit main nginx configuration file:

user  nginx;
worker_processes  2;
 
error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;
 
 
events {
worker_connections  1024;
}
 
 
http {
 
include       /etc/nginx/mime.types;
default_type  application/octet-stream;
 
log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
 
access_log  /var/log/nginx/access.log  main;
 
sendfile        on;
#tcp_nopush     on;
 
keepalive_timeout  65;
 
#gzip  on;
 
#-> Websocket
map $http_upgrade $connection_upgrade {
default upgrade;
'' close;
}
#<--Websocket
 
 
 
include /etc/nginx/conf.d/*.conf;
}

Add site1 configuration file

upstream websocket {
server 192.168.1.10:8043;
}
 
server {
 
listen 10.4.4.200:443 ssl;
 
server_name site1.provlima.com;
ssl_certificate     /data/cert/cert.crt;
ssl_certificate_key /data/cert/cert.key;
ssl_protocols       TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers         HIGH:!aNULL:!MD5;
 
 
proxy_connect_timeout 60s;
proxy_send_timeout 120s;
proxy_read_timeout 120s;
 
 
 
location / {
 
proxy_pass https://site1.internal.com:8043;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
 
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
 
}
 
}