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Why does my website not load if I type:

But it does work when I type:

Is this a setting in IIS?

We are using ASP.NET 3.5 with a SQL Server database.

Thanks in advanced!

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up vote 3 down vote accepted

Even if you have the DNS records for and pointing to the web server, you must still tell IIS7 which site to serve up when it sees these domains.

This is acheived through adding a "Binding" for each domain name (called a Host Header) to tell IIS which "site" to serve up to the client.

You will need a binding for "" and a binding for "".

See a picture here:

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You can see a text description here, too: – Kenny Mar 5 '10 at 11:59

What you need is having tool for URL rewrite to check if URL was put as, if so - add www. inside. For this things you'll need additional software for redirect. Me myself was using ISAPI_Rewrite tool for simple things like rewrite, also this software can be provided free. Now I'm using Helicon Ape as an Apache emulator for IIS7.

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Typically you have to actually add a DNS record for to your DNS in order for your site to be accessible at both and - if both of these records already exist in the DNS then it's probably an IIS setting somewhere

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Kenny's solution is probably the simplest. But if your web pages or application code depend on the url being, they won't work properly.

A different solution is to set up a new site for in IIS and use an http redirect to refer requests to Your users' sessions will continue on, and all your site code will work as normal.

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In apache I would add as an alias to and done.
I suppose in IIS should be the same principle...

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