load_module /usr/local/libexec/nginx/ngx_mail_module.so;
load_module /usr/local/libexec/nginx/ngx_stream_module.so;

user www;
worker_processes auto;

pid /var/run/nginx.pid;

events {
  use kqueue;
  worker_connections 1024;
  multi_accept on;
}
http {

  # Basic settings
  # ----------

  sendfile on;
  tcp_nopush on;
  tcp_nodelay on;
  reset_timedout_connection on;
  keepalive_timeout 65;
  keepalive_requests 1000;
  types_hash_max_size 2048;
  server_tokens off;
  send_timeout 30;
  server_names_hash_max_size 4096;

  # Common limits
  # ----------

  client_max_body_size 100m; # upload size
  client_body_buffer_size 1m;
  client_header_timeout 3m;
  client_body_timeout 3m;

  client_body_temp_path /var/tmp/nginx/client_body_temp;

  proxy_connect_timeout 5;
  proxy_send_timeout 10;
  proxy_read_timeout 10;

  proxy_buffer_size 4k;
  proxy_buffers 8 16k;
  proxy_busy_buffers_size 64k;
  proxy_temp_file_write_size 64k;

  proxy_temp_path /var/tmp/nginx/proxy_temp;

  include mime.types;
  default_type application/octet-stream;

  # Logs format
  # ----------

  log_format main '$remote_addr - $host [$time_local] "$request" '
                  '$status $body_bytes_sent "$http_referer" '
                  '"$http_user_agent" "$http_x_forwarded_for"'
                  'rt=$request_time ut=$upstream_response_time '
                  'cs=$upstream_cache_status';

  log_format cache '$remote_addr - $host [$time_local] "$request" $status '
                   '$body_bytes_sent "$http_referer" '
                   'rt=$request_time ut=$upstream_response_time '
                   'cs=$upstream_cache_status';

  access_log /var/log/nginx/access.log main;
  error_log /var/log/nginx/error.log warn;

  # GZip config
  # ----------

  gzip on;
  gzip_static on;
  gzip_types text/plain text/css text/javascript text/xml application/x-javascript application/javascript application/xml application/json image/x-icon;
  gzip_comp_level 9;
  gzip_buffers 16 8k;
  gzip_proxied expired no-cache no-store private auth;
  gzip_min_length 1000;
  gzip_disable "msie6"
  gzip_vary on;

  # Cache config
  # ----------

  proxy_cache_valid 1m;

  # Virtual host config
  # ----------

  # SSL
  # ----------

  ssl_certificate /usr/local/etc/letsencrypt/live/truenas/fullchain.pem;
  ssl_certificate_key /usr/local/etc/letsencrypt/live/truenas/privkey.pem;
  # Verify chain of trust of OCSP response using Root CA and Intermediate certs
  ssl_trusted_certificate /usr/local/etc/letsencrypt/live/truenas/chain.pem;

  ssl_session_timeout 1d;
  ssl_session_cache shared:MozSSL:10m;  # about 40000 sessions
  ssl_session_tickets off;

  # intermediate configuration
  # Keep only TLS 1.2 (+ TLS 1.3)
  ssl_protocols TLSv1.2 TLSv1.3;
  # Use only strong ciphers
  ssl_ciphers TLS-CHACHA20-POLY1305-SHA256:TLS-AES-256-GCM-SHA384:TLS-AES-128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
  # Use more secure ECDH Curve
  ssl_ecdh_curve X25519:P-521:P-384:P-256;
  # Defend against the BEAST attack
  ssl_prefer_server_ciphers off;

  # OCSP Stapling
  ssl_stapling on;
  ssl_stapling_verify on;

  include /usr/local/etc/nginx/conf.d/*.conf;
}