# PostfixAdmin-RS behind nginx with TLS.
# In config.toml set:  trusted_proxies = ["127.0.0.1", "::1"], cookie_secure = true, hsts = true
#
# Serving under a sub-path (e.g. https://mail.example.com/postfixadmin/) also works:
# set base_path = "/postfixadmin" in config.toml and use `location /postfixadmin/`
# with `proxy_pass http://127.0.0.1:8080;` (no trailing slash).

server {
    listen 80;
    listen [::]:80;
    server_name admin.example.com;
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    http2 on;
    server_name admin.example.com;

    ssl_certificate     /etc/letsencrypt/live/admin.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/admin.example.com/privkey.pem;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;

    client_max_body_size 4m;
    server_tokens off;

    # Optional: restrict the panel to known networks.
    # allow 203.0.113.0/24;
    # deny all;

    location / {
        proxy_pass http://127.0.0.1:8080;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_read_timeout 90s;
    }

    # Slow down credential stuffing in addition to the built-in rate limit.
    location = /api/auth/login {
        limit_req zone=pa_login burst=5 nodelay;
        proxy_pass http://127.0.0.1:8080;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

# Put this into the http {} block (e.g. /etc/nginx/conf.d/postfixadmin-rs-limits.conf):
# limit_req_zone $binary_remote_addr zone=pa_login:10m rate=10r/m;