I have an IIS7/WinServer2008 configuration with a wildcard SSL certificate installed (*.mydomain.com). The web server holds several websites each configured to route via a host header off the same IP (call it IP1). Some of the sites are configured to use SSL and some are not.

So I have...

a.mydomain.com -> SSL
b.mydomain.com -> non-SSL
c.mydomain.com -> SSL
d.mydomain.com -> non-SSL
e.mydomain.com -> non-SSL


For the example sites A and C above (the SSL sites) I wanted standard HTTP URL's to redirect to HTTPS. So at the root of IIS (red arrow) I have configured the Error Pages settings by adding a custom Status Code of 403.4 (see below for the settings).

Added customer 403.4 status code

Edit Settings dialog

Edit Feature Settings dialog

The contents of the redirectHttpToHttps.htm file are...

<script language="JavaScript">
function redirectHttpToHttps()
    var httpURL= window.location.hostname + window.location.pathname + window.location.search;
    var httpsURL= "https://" + httpURL;
    window.location = httpsURL;

Then for both the A and C sites I replaced the old bindings with an SSL binding (routed specifically to IP1) and set the SSL settings to "Require SSL".

So everything works great. Site A redirects http://a.mydomain.com to https://a.mydomain.com and similarly Site C does the same thing.

Now I have a non-wildcard SSL cert to introduce into the mix. This is for the site bound to aaa.customerdomain.com. So I added the cert to my IIS server, and changed the binding of the aaa.customerdomain.com site to use an SSL binding with the new cert and against a new IP2.

So now if I navigate to https://aaa.customerdomain.com, everything works great. However, I don't know how I can get http://aaa.customerdomain.com to redirect to the SSL version.

Can someone help me with the proper way to configure IIS so I can make all this work?


To handle various types of redirect in IIS try using the url rewrite module


Then add this in web config per site for http to https redirect:

<rule name="Redirect to HTTPS" stopProcessing="true">
  <match url="(.*)" />
    <conditions><add input="{HTTPS}" pattern="^OFF$" />
  <action type="Redirect" url="https://{HTTP_HOST}/{R:1}" redirectType="SeeOther" />

You can also accomplish this using GUI via IIS url rewrite module interface: enter image description here enter image description here

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