• Basic website configuration
• nginx proxy_pass - site2.com -> site1.com/site2-page
• Basic Reverse Proxy Configuration

Basic website configuration

server {
    listen 8080;
    listen [::]:8080;

    server_name example.com;
    root /var/www/example;
    index index.php index.html index.htm;
    access_log /var/log/nginx/access_example.log;
    error_log /var/log/nginx/error_example.log;
}

nginx proxy_pass - site2.com -> site1.com/site2-page

Scenarios

• nginx and wordpress - site2.com need to load content of of site1.com/site2 without url change
• show a landing page for subdomain (sub.site1.com) by using site1.com/sub-page
• How to Redirect a Domain without Changing the URL on browser.

Sample nginx configuration file for site2.com

server {
    index index.php index.html index.htm;

    server_name site2.com www.site2.com;

    access_log /var/log/nginx/access_site2.log;
    error_log /var/log/nginx/error_site2.log;

    location / {
        proxy_pass https://www.site1.com/site2/;
        proxy_ssl_server_name on;
    }

    listen [::]:443 ssl ipv6only=on; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/site2.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/site2.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
    if ($host = www.site2.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    if ($host = site2.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    listen 80;
    listen [::]:80;
    server_name site2.com www.site2.com;
    return 404; # managed by Certbot
}

Basic Reverse Proxy Configuration

server {
  listen 80;
  listen [::]:80;

  access_log /var/log/nginx/reverse-access.log;
  error_log /var/log/nginx/reverse-error.log;

  location / {
    proxy_pass http://127.0.0.1:8080;
  }
}

(Photo by luis gomes from Pexels)

References

• How to Redirect a Domain without Changing the URL(.htaccess and apache)
• My post on serverfault.com