Nginx：404错误时返回301重定向

server {
        listen             12680;
        root       /home/noahc/webapps/nginx/html/noahc/;
        server_name    www.dongguan.ltd, dongguan.ltd;
        error_page 404 @foobar;

        location @foobar {
                rewrite  .*  / permanent;
                }
         }