---
apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-snippets
  namespace: atat
data:
  ssl.conf: |-
    # Guard against HTTPS -> HTTP downgrade
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; always";
    # Set SSL protocols, ciphers, and related options
    ssl_protocols TLSv1.3 TLSv1.2;
    ssl_ciphers TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_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:!EXPORT;
    ssl_prefer_server_ciphers on;
    ssl_ecdh_curve X25519:prime256v1:secp384r1;
    ssl_dhparam /etc/ssl/dhparam.pem;
    # SSL session options
    ssl_session_timeout 4h;
    ssl_session_cache shared:SSL:10m;   # 1mb = ~4000 sessions
    ssl_session_tickets off;
    # OCSP Stapling
    ssl_stapling on;
    ssl_stapling_verify on;
    resolver 8.8.8.8 8.8.4.4;