First, go to central admin on SharePoint and click to "Configure Alternate Access Mapping". Change the URL that you want to a name that the company wants to have. Then go to IIS on the Application Server, where the SharePoint 2010 is installed. At the left side, choose your site, and click then on "BINDINGS" Add a new one and fill in the information...
Then go to the DNS server ( actually Domain controller ) and add a NEW A or AAAA
As last, give the host the same properties as on IIS.
Perform an IIS restart and re-browse..
Richard Mueller edited Revision 9. Comment: Removed (en-US) from title, added tag
FZB edited Revision 8. Comment: typo
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Ed Price - MSFT edited Original. Comment: Great article! Title and minor grammar.
After reading the blog below, I'm not so sure this is an appropriate solution.
This apparently works but isn't recommended since stopping/starting the SharePoint Foundation web application service will overwrite and manually update the host header back to its original host header URL.
blogs.msdn.com/.../how-to-properly-change-the-host-header-url-of-a-web-application-in-sharepoint-2010.aspx