ssl_session_cache shared:ssl_session_cache:10m; # For increased performance, allow some session re-using

# Redirect every http call to https, basically disallowing direct http access to anything.
server {
  listen 80; # Listen on port 80 IPv4
  listen [::]:80; # Listen on port 80 IPv6

  #server_name example.com; #defaulting for all

  return 301 https://$host$request_uri; # Try again with https
}

server {
	# Other nginx stuff not concerning syncthing is placed here
	server_name example.com #your hostname here
	...
	...
	...
}

# https-reverse-proxy for syncthing
server {
  listen 443 ssl http2; # Listen on port IPv4; port 443; use SSL/TLS; use http/2 if supported by client;
  listen [::]:443 ssl http2; # Same as above, but for IPv6

  server_name syncthing.example.com; #place your hostname here
  ssl_certificate /etc/letsencrypt/live/<domain>/fullchain.pem; # Path to let's encrypt certificates
  ssl_certificate_key /etc/letsencrypt/live/<domain>/privkey.pem;

  # Ensure adequate TLS cipher suites are used - taken from Mozilla recommended configurations, see here: https://wiki.mozilla.org/Security/Server_Side_TLS#Intermediate_compatibility_.28default.29
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
  ssl_ciphers ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS;
  ssl_prefer_server_ciphers on;

  location / {
	  # Forward some required and/or recommended headers
      proxy_set_header Host $host;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

	  # For better performance reasons when transferring large data behind a reverse proxy. Probably not neccessary for syncthing.
      proxy_buffers           32 4m;
      proxy_busy_buffers_size     25m;
      proxy_buffer_size 512k;

      proxy_max_temp_file_size 0;

      proxy_pass http://localhost:8384/; # Assuming syncthing GUI is running on localhost port 8384
  }
}