DotNetNuke Configuration Error

Domain Name "" Does Not Exist In The Database

DotNetNuke supports multiple portals from a single database/codebase. It accomplishes this by converting the URL of the client browser Request to a valid PortalID in the Portals database table. The following steps describe the process:

1. Web Server Processing
  • When a web server receives a Request from a client browser, it compares the file name extension on the target URL resource to its Application Extension Mappings defined in IIS.
  • Based on the corresponding match, IIS then sends the Request to the defined Executable Path ( aspnet_asapi.dll in the case of ASP.NET Requests ).
  • The aspnet_isapi.dll engine processes the Request in an ordered series of events beginning with Application_BeginRequest.

  • 2. Application_BeginRequest ( globals.asax.vb )
  • The Request URL is parsed based on the "/" character
  • A Domain Name is constructed using each of the relevant parsed URL segments.


    URL: = Domain Name:
    URL: = Domain Name:
    URL: http://localhost/DotNetNuke/default.aspx = Domain Name: localhost/DotNetNuke
    URL: = Domain Name:
    URL: = Domain Name:

  • Using the Domain Name, the application queries the database ( Portals table - PortalAlias field ) to locate a matching record.

    Note: If there are multiple URLs which correspond to the same portal then the PortalAlias field must contain each valid Domain Name in a comma seperated list.


    URL: http://localhost/DotNetNuke/default.aspx
    URL: http://MACHINENAME/DotNetNuke/default.aspx
    PortalAlias: localhost/DotNetNuke,MACHINENAME/DotNetNuke,

    Note: If you are installing the application to a remote server you must modify the PortalAlias field value for the default record in the Portals table according to the rules defined above.