IIS使用ISAPI_REWRITE3返回503代码

#for 3.x

RewriteCond %{HTTP:Host} ^.*abc\.net.*$
RewriteRule (.*) /503.asp

503.asp

<%
Response.Status="503 Service Temporarily Unavailable"
%>

Service Temporarily Unavailable

The server is temporarily unable to service your
request due to maintenance downtime or capacity
problems. Please try again later.

----

503.php

ob_start();
header('HTTP/1.1 503 Service Temporarily Unavailable');
header('Status: 503 Service Temporarily Unavailable');
header('Retry-After: 3600');
header('X-Powered-By:');
?>

Service Temporarily Unavailable

The server is temporarily unable to service your
request due to maintenance downtime or capacity
problems. Please try again later.

如果有IIS的控制权，可以为站点建一个独立的应用程序池，然后把应用程序池暂停也可以。