Download the WebPlatFormInstaller, run it and choose Web Platform (pane) > Security (bottom) > IP and Domain Restrictions. Restart your IIS Manager, and the feature should be there!
← Attach database failed for Server […] Unable to open the physical file “[…]”. Operating system error 5: “5(failed to retrieve text for this error. Reason: 15105)”. (Microsoft SQL Server, Error: 5120)
How to install ASPSmartUpload on Windows 7 / Vista / Server 2008 →