Taken from https://support.microsoft.com/kb/324000
When you use Apache, you can redirect URLs by using the Redirect directive to point a folder or a location to a different folder on either the same Web site or a different Web site. You can also alias a folder to another location by using the Alias directive. If you use IIS, you can perform the same tasks by using the URL Redirection functionality.
To redirect a folder or file IIS:
- Log on to the Web server computer as an administrator.
- Click Start, point to Settings, and then click Control Panel.
- Double-click Administrative Tools, and then double click Internet Services Manager.
- Right-click the Web site or the folder, and then click Open.
- Right-click the folder display, point to New, and then click Folder.
- Return to Internet Services Manager.
- Right-click the folder that you just created, and then click Properties.
- Click the Directory tab, and then click A redirection to a URL.
- To redirect the folder to another URL, click the URL of the folder or the Web site that is described in step 4, and then type the complete URL to the new site in the Redirect to box.
- To redirect the folder to another folder within in this folder (for example, Projects to Sections/Departments/Projects), click A directory below this one, and then type the new folder in the Redirect to box.
- To mark the redirection type as a permanent redirection (and not a temporary redirection), click A permanent redirection for this resource.
If you use this setting, bookmarks and other details are automatically updated on some browsers.
- Click OK to save the changes.