If the local update site must be centrally accessible via HTTP, you must install an HTTP server to host the local update site.
You can use the Update Site Tool to create a mirror of an update site on a local machine. With the tool you can make a mirror of a given version of the SAP NetWeaver Developer Studio or combine different versions (such as different Service Packages), according to users' needs.
You can grant access to the mirror for users who need these updates but do not have access to SAP Service Marketplace.
Having a mirror of an update site in your local network can also increase the speed of the updates of the SAP NetWeaver Developer Studio.
With the Update Site Tool you can create a new local update site or change the content of an already existing mirror.