While installing ArcGIS 10.4 for Server on Red Hat Enterprise Linux (RHEL) 5.7 using either GUI, silent, or console mode, authorizing the software using a .prvc file fails with the following error:
Unable to send your authorization information to Esri via the internet. Please check your internet connection and try again. Retry?
The Software Authorization Wizard used during ArcGIS 10.4 for Server installation is incompatible with RHEL5.7, and is unable to access the internet to complete the authorization process.