Duplicate Host page manages settings to normalize a host name. For examples, n2sm.net is replaced with www.n2sm.net in url.
Select Crawler > Duplicate Host in the left menu to display a list page of Duplicate Host Configuration, as below.
Click a configuration name if you want to edit it.
Click Create New button to display a form page for Duplicate Host configuration.
Click a configuration on a list page, and click Delete button to display a confirmation dialog. Click Delete button to delete the configuration.