A CCESS GATEWAYIntroduction 21Running as a continuous background client program on a computer, NTP sends periodic timerequests to servers, obtaining server time stamps and using them to adjust the client's clock.Portal Page RedirectThe NSE contains a comprehensive HTTP page redirection logic that allows for a page redirectbefore (Portal Page Redirect) and/or after the authentication process (Home Page Redirect).As part of the Portal Page Redirect feature, the NSE can send a defined set of parameters to theportal page redirection logic that allows an External Web Server to perform a redirection basedon: Access Gateway ID and IP Address Origin Server Port Location Subscriber MAC address Externally hosted RADIUS login failure pageThis means that the network administrator can now perform location-specific service branding(for example, an airport lounge) from a centralized Web server.See also, ““Adding and Updating Port-Location Assignments {Add}” on page 192Home PageRedirect” on page 16.RADIUS-driven Auto ConfigurationNomadix’ unique RADIUS-driven Auto Configuration functionality utilizes the existinginfrastructure of a mobile operator to provide an effortless and rapid method for configuringdevices for fast network roll-outs. Once configured, this methodology can also be effectivelyused to centrally manage configuration profiles for all Nomadix devices in the public accessnetwork.Two subsequent events drive the automatic configuration of Nomadix devices:1. A flow of RADIUS Authentication Request and Reply messages between the Nomadixgateway and the centralized RADIUS server that specifies the location of the metaconfiguration file (containing a listing of the individual configuration files and theirdownload frequency status) are downloaded from an FTP server into the flash of theNomadix device.2. Defines the automated login into the centralized FTP server and the actual downloadprocess into the flash.Optionally, the RADIUS authentication process and FTP download can be secured by sendingthe traffic through a peer-to-peer IPSec tunnel established by the Nomadix gateway and
