#
# this is an example nginx config for using SSL with zammad
# this can be adjusted to be used with self-signed, trusted ca, and letsencrypt certs
# replace all occurrences of example.com with your domain
# If using LetsEncrypt create letsencrypt certificate by: certbot certonly --webroot -w /var/www/html -d www.example.com
# create dhparam.pem by: openssl dhparam -out /etc/nginx/ssl/dhparam.pem 4096
# download LetsEncrypt x3 certificate by: wget -q https://letsencrypt.org/certs/lets-encrypt-x3-cross-signed.pem -P /etc/nginx/ssl
# you can test your ssl configuration @ https://www.ssllabs.com/ssltest/analyze.html
#

upstream zammad-railsserver {
  server localhost:3000;
}

upstream zammad-websocket {
  server localhost:6042;
}

server {
  listen 80;

  server_name example.com www.example.com;

  access_log /var/log/nginx/zammad.access.log;
  error_log /var/log/nginx/zammad.error.log;

  location /.well-known/ {
    root /var/www/html;
  }

  location / {
    rewrite ^/(.*)$ https://example.com/$1 permanent;
  }
}


server {
  listen 443 ssl http2;

  server_name example.com;

  ssl_certificate /etc/nginx/ssl/your_cert.crt;
  ssl_certificate_key /etc/nginx/ssl/your_private_key.key;

  ssl_protocols TLSv1.2;

  ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';

  ssl_dhparam /etc/nginx/ssl/dhparam.pem;

  ssl_prefer_server_ciphers on;

  ssl_session_cache shared:SSL:10m;
  ssl_session_timeout 180m;

  ssl_stapling on;
  ssl_stapling_verify on;

  ssl_trusted_certificate /etc/nginx/ssl/your_cert.crt;

  resolver 8.8.8.8 8.8.4.4;

  add_header Strict-Transport-Security "max-age=31536000" always;

    location = /robots.txt  {
        access_log off; log_not_found off;
    }

    location = /favicon.ico {
        access_log off; log_not_found off;
    }

    root /opt/zammad/public;

    access_log /var/log/nginx/zammad.access.log;
    error_log  /var/log/nginx/zammad.error.log;

    client_max_body_size 50M;

    location ~ ^/(assets/|robots.txt|humans.txt|favicon.ico) {
        expires max;
    }

    location /ws {
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
        proxy_set_header CLIENT_IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_read_timeout 86400;
        proxy_pass http://zammad-websocket;
    }
    location / {
        proxy_set_header Host $http_host;
        proxy_set_header CLIENT_IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_read_timeout 180;
        proxy_pass http://zammad-railsserver;

    gzip on;
    gzip_types text/plain text/xml text/css image/svg+xml application/javascript application/x-javascript application/json application/xml;
    gzip_proxied any;
  }
}