#!/bin/sh

set -e

apt-get -y install nginx-light libnginx-mod-http-headers-more-filter
printf 'access_log off;\nlog_not_found off;\nmore_clear_headers server;\nserver_tokens off;\n' > /etc/nginx/conf.d/base.conf
openssl dhparam -out /etc/ssl/dh4096.pem 4096
chown root:ssl-cert /etc/ssl/dh4096.pem
chmod 440 /etc/ssl/dh4096.pem
printf \
'ssl_session_timeout 1d;
ssl_session_cache shared:SSL:10m;  # about 40000 sessions
ssl_session_tickets off;

# curl https://ssl-config.mozilla.org/ffdhe2048.txt > /path/to/dhparam
ssl_dhparam /etc/ssl/dh4096.pem;

# intermediate configuration
ssl_protocols TLSv1.2 TLSv1.3;
ssl_ciphers 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;
ssl_prefer_server_ciphers off;

# HSTS (ngx_http_headers_module is required) (63072000 seconds)
#add_header Strict-Transport-Security "max-age=63072000" always;

# OCSP stapling
ssl_stapling on;
ssl_stapling_verify on;' > /etc/nginx/snippets/ssl.conf
systemctl reload nginx