LNS

L2TP network server. A Point-to-Point Protocol (PPP) server with Layer 2 Tunneling Protocol (L2TP) capabilities that is the end point of a session.The LNS handles the authentication of the user via a RADIUS server and routes network traffic to and from the user. The LNS has no physical ports, only virtual interfaces. On a PortMaster 4, an LNS can be an LNS board, a Quad T1 or Tri E1 board, or the entire device.

See also L2TP, LAC, and PPP.