參考文章 https://medium.com/@tyh409700530/nginx-reverse-proxy-wordpress-in-https-mode-a21658f23978 ，使用 nginx，於 nginx 設定檔設定：

# location 設定
location / {
    proxy_pass http://127.0.0.1:8080;
    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-Host $server_name;
    proxy_set_header X-Forwarded-Proto $scheme;

    proxy_redirect off;
}

確保wp-config.php加入以下原始碼，否則使用HTTPS連線時，有機會遇到redirect loop (HTTP 302)：

if (isset($_SERVER[‘HTTP_X_FORWARDED_HOST’])) {
    $_SERVER[‘HTTP_HOST’] = $_SERVER[‘HTTP_X_FORWARDED_HOST’];
}
if (isset($_SERVER[‘HTTP_X_FORWARDED_PROTO’])) {
    if ($_SERVER[‘HTTP_X_FORWARDED_PROTO’] == ‘https’) {
        $_SERVER[‘HTTPS’] = ‘on’;
    }
}

官網提供的範例是：

if( strpos( $_SERVER['HTTP_X_FORWARDED_PROTO'], 'https') !== false )
    $_SERVER['HTTPS'] = 'on';