Nginx - redirecting non-www to www hostnames

First posted on: 2019/07/19

Last modified: 2019/07/21,465d7ef

Categories: infrastructure

Introduction

I wanted a Nginx configuration which would satisfy the following requirements:

  1. Any example.com requests should be redirected to www.example.com
  2. The above should happen for http and https
  3. http://example.com should redirect directly to https://www.example.com

Solution

We will need four server blocks:

  1. http - example.com (listen on 80)
  2. http - www.example.com (listen on 80)
  3. https - example.com (listen on 443)
  4. https - www.example.com (listen on 443)

I obviously went through a bit of hit and trial, but my main issue was around how I would setup (3) correctly. Since (3) is https, I needed to setup it up like (4) pointing it to the right SSL cert and key.

The following Nginx configuration will achieve it:

upstream yourupstream {
  server 127.0.0.1:8080;
}

server {
  listen 80;
  server_name example.com;
  return 301 https://www.example.com$request_uri;
}

server {
  listen 80;
  server_name www.example.com;
  return 301 https://$host$request_uri;

}

server {

  listen 443;
  server_name example.com;
  include /etc/nginx/custom_configs/tls_settings;
  ssl_certificate /etc/nginx/ssl/certificate;
  ssl_certificate_key /etc/nginx/ssl/keyfile;
  include /etc/nginx/custom_configs/log_settings;
  return 301 https://www.example.com$request_uri;
}


server {

  listen 443;
  server_name www.example.com;
  include /etc/nginx/custom_configs/tls_settings;
  ssl_certificate /etc/nginx/ssl/certificate;
  ssl_certificate_key /etc/nginx/ssl/keyfile;  

  location / {
    include /etc/nginx/conf.d/proxy_settings;
    proxy_pass http://myupstream;
  }
}

Learn more

I got help from the following resources:

Related posts

If you like this post, you may also like my other posts on Nginx: