Question : Need to temporarily redirect all pages asp.net c#

I am moving my site from datacenter 1 to datacenter 2.  I changed IIS to serve up a site down page, but I forgot to account for any crawled links to other pages.  

I want to temporarily redirect every page to a site-down.asp page (the site is in .net but this was a quickie page)..  How can I do this?  Code in web.config?  I need this asap.

Thanks

Answer : Need to temporarily redirect all pages asp.net c#

Put up a site that only contains one link:  sitedown.htm
Change the 404 message to redirect to that .htm file.

I'd create a second IIS site with the same IP/hostname for this configuration so you can re-use it during maintenance cycles..