Report Server was formerly referred to as OPNET Report Server.
This software is no longer available for download and no longer supported. Riverbed recommends transitioning to use of publicly available tools for document distribution. There is a white paper available describing how to use SharePoint as a replacement for Report Server:
Alert: Report Server 2.6.4 represents the final release of Report Server. No additional releases or patches are planned. This is a free product provided by Riverbed for exclusive use with select SteelCentral analysis software. Riverbed Report Server is supplied as-is with no product support expressed or implied.