AudioCodes MediaPack MP-201B, Руководство пользователя, Страница: 118 / 270

MP-20x Telephone Adapter 118 Document #: LTRT-50609
User's Manual
10.3.7 DNS Server
Refer to 'Settings Tab' on page 106 .
10.3.8 Routing
Refer to 'Routing Tab' on page 108 .
10.3.9 Internet Connection Firewall
Refer to 'Advanced Tab' on page 109 .
10.4 WAN L2TP
Layer 2 Tunneling Protocol (L2TP) is an extension to the PPP protocol, enabling your MP-
20x to create VPN connections. Derived from Microsoft's Point-to-Point Tunneling Protocol
(PPTP) and Cisco's Layer 2 Forwarding (L2F) technology, L2TP encapsulates PPP frames
into IP packets either at the remote user's PC or at an ISP that has an L2TP Remote
Access Concentrator (LAC). The LAC transmits the L2TP packets over the network to the
L2TP Network Server (LNS) at the corporate side.
With your MP-20x, L2TP is targeted at serving two purposes:
1. Connecting MP-20x to the Internet when it is used as a cable modem, or when using
an external cable modem. Such a connection is established using user name and
password authentication.
2. Connecting MP-20x to a remote network using a Virtual Private Network (VPN) tunnel
over the Internet. This enables secure transfer of data to another location over the
Internet, using private and public keys for encryption and digital certificates, and user
name and password for authentication.
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To create a new L2TP connection:
1. From the sidebar menu, click the Network Connections menu; the screen 'Network
Connections' opens.
2. Click the link New Connection ; the 'Connection Wizard' screen opens.