Nginx proxy domain to another domain with no change URL

Solution 1:

You set:

proxy_set_header Host $host;

You want:

proxy_set_header Host connect2.domain.ru;

Solution 2:

So I think - here is the solution if I understood the problem correctly:

 # backend.wants.this.server.com
 # browser.shows.this.server.com

server {
  listen 80;
  server_name browser.shows.this.server.com;

  location / {
     proxy_set_header Host backend.wants.this.server.com;
     proxy_redirect http://backend.wants.this.server.com/ http://browser.shows.this.server.com/; 
  }
}

---

Solution 3:

Telepathy about port 8080 has been turned off, because you don't show us the full config.

server {
    listen 80;
    server_name connect3.domain.ru www.connect3.domain.ru;

    location / {
        proxy_pass http://connect2.domain.ru;
        proxy_set_header Host connect2.domain.ru;
    }
}