Be sure to use distinct names in your SharePoint Web Applications
If you are creating an externally accessible portal or extranet with SharePoint which uses Forms based authentication, business requirements such as Search and ECM Publishing might require you to create an intranet portal which uses NTLM or Kerberos authentication. To do this, you'd first create a Web Application in SharePoint, then you'd go back and extend that web application to add the second zone. However tempting it might be to give these portals the same description, don't. The misnamed Description field is actually the name that shows up in the IIS Manager application. If you give two Web Apps the same name, they won't get distinct entries in the IIS Admin web sites section. This has the effect of IIS not being able to find your site and sending incoming requests for the duplicate named site to the default web site (which normally shows a "Under Construction" message)
