for adding a second website to your existing DNN installation, you just need to add it to your IIS Website bindings and add the site in Host > Website Management.

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Cheers from Germany,
Sebastian Leupold

   

Speed up your DNN Websites with TurboDNN

The you need to add another domain in that hosting provider control panel that points to the same website, it is probably called a domain alias in the control panel. If you don't find the way, let us know the provider, they must have support documentation explaining how to add an alias.