nginx拦截非法referer

valid_referers 520hzj.duapp.com www.ddayh.com qiqi188.duapp.com glxhxx.cn hsss99.com ww.99876.net xhxx.500yun.com seo17.net www.glxhxx.cn;
    if ($invalid_referer != 1) {
        rewrite ^.*$ http://www.magentobbs.com;
        #return 403;
           }