A web proxy can perform various functions, such as caching web sites for repeated access, etc. One of the possible uses of such a system is as a reverse proxy.
According to the definition HAN is a reverse proxy
As you can see in the illustration, users can only access online resources by communicating with the HAN server. To publish online resources using HAN server, the administrator defines a URL as an entry point for each e-journal in the form
The user then points a browser at this URL in order to access the on-line resource. The HAN server then initiates communication with the content provider, executing any scripts necessary for authentication or other purposes. Once the content server supplies the desired document, HAN delivers it to the user.