A customer wants to disable anonymous access to a directory on an IIS website domain.tld.
Anonymous access to the directory http://domain.tld/directory should be prohibited and asking for login/password to be accessed.
Create virtual directory for the website in the POA Customer Control Panel
Home > Websites > select site > More Tools > Virtual directories > Add Virtual Directory
Disable anonymous access in security settings for the created virtual directory:
CCP > Home > Websites > select site > More Tools > Virtual directories > select virtual directory > Security
For more details please refer to the following chapter in the POA Subscriber's Guide: Managing Domain Security.