When you are connecting to a SharePoint server, you’re redirected to the default website (for IIS7 you will see the IIS7 image).
IIS can listen on port 80 for multiple websites. If the given hostname corresponds with the configured binding in IIS, IIS will show the correct website. But SharePoint only listens on the hostnames which are configured within the alternate access mappings. Follow the steps below to configure the bindings in IIS and alternate access mappings within SharePoint.
Configure bindings IIS manager
1. Open the IIS manager (Start > Run > inetmgr)
2. In Sites, right-click the SharePoint site and click Edit Bindings…