Use nginx to redirect www and non https to bare https

Given any url like any of these:

http://www.example.com
http://example.com
https://www.example.com

redirect to this:

https://example.com

....that is, https (not http) and "bare" (no www. before the domain).

(Whether you want to go bare or not is between you and your trusted board of advisors.)

First, though: Why do this at all?

  1. For security we want it all to be https`
  2. We want a single canonical url, for SEO/traffic/google-juice/google search console purposes.

nginx config

Here's an nginx config file that does it...

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

server {
    listen 443 ssl;
    server_name www.example.com;
    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot

    return 301 https://example.com$request_uri;
}

server {
    listen 443 ssl; # managed by Certbot
    server_name example.com;
    location / {
        proxy_pass http://localhost:8000;
        proxy_http_version 1.1;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection keep-alive;
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot

    ssl_dhparam /etc/ssl/certs/dhparam.pem;
}

After changing nginx config -- test it is ok with:

sudo nginx -t

And reload it with:

sudo nginx -s reload

See more nginx basics here

sources

see also

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