H OTS POT GATEWAYIntroduction 15MAC FilteringMAC Filtering enhances Nomadix' access control technology by allowing systemadministrators to block malicious users based on their MAC address. Up to 50 MACaddresses can be blocked at any one time. See also, “Session Rate Limiting (SRL)”on page 20.Multi-Level Administration SupportThe NSE allows you to define 2 concurrent access levels to differentiate betweenmanagers and operators, where managers are permitted read/write access andoperators are restricted to read access only.Once the logins have been assigned, managers have the ability to perform all writecommands (Submit, Reset, Reboot, Add, Delete, etc.), but operators cannot changeany system settings. When Administration Concurrency is enabled, one manager andthree operators can access the HSG platform at any one time.NTP SupportThe NSE supports Network Time Protocol (NTP), an Internet standard protocol thatassures accurate synchronization (to the millisecond) of computer clock times in anetwork of computers. NTP synchronizes the client’s clock to the U.S. NavalObservatory master clocks. Running as a continuous background client program on acomputer, NTP sends periodic time requests to servers, obtaining server time stampsand using them to adjust the client's clock.Portal Page RedirectThe NSE contains a comprehensive HTTP page redirection logic that allows for apage redirect before (Portal Page Redirect) and/or after the authentication process(Home Page Redirect). As part of the Portal Page Redirect feature, the NSE can senda defined set of parameters to the portal page redirection logic that allows an ExternalWeb Server to perform a redirection based on:z HSG ID and IP Addressz Origin Serverz Port Locationz Subscriber MAC addressz Externally hosted RADIUS login failure pageThis means that the network administrator can now perform location-specific servicebranding (for example, an airport lounge) from a centralized Web server.See also, “Home Page Redirect” on page 11.
