D-Link DVX-2002F User Manual page 93

radio button of L2TP to configure L2TP VPN server.
Enable: Tick the checkbox to enable L2TP VPN server.
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Remote Start IP, Remote End
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end IP there must be less than 10 available IP addresses.
Local IP: L2TP VPN local server IP address.
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Primary DNS: Primary DNS for VPN connection.
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Alternate DNS: Alternative DNS for VPN connection.
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Authentication Method
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pap: Password Authenticate Protocol,PAP works like a standard login procedure; it uses
static user name and password to authenticate the remote system.
chap: Challenge Handshake Authentication Protocol
CHAP takes a more sophisticated and secure approach to authentication by creating a
unique challenge phrase (a randomly generated string) for each authentication.
Debug: Tick to enable debug for L2TP VPN connection, debug info will be written into system
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logs.
IPSec: Enable IPSecencryption for L2TP VPN server.
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IPSec Local IP: DVX WAN IP which can access Internet.
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IPSec Password: Define a password for IPSec VPN client to authenticate.
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Notice:
If the DVX IPPBX system is behind NAT, you need to open ports 500, 4500 and 1701 on the router/firewall.
For the VPN client to connect you'll need to create a VPN user account.
Click "VPN User Management" tab and click
IP: L2TP VPN remote network IP range, between start IP and
: Select the authentication method: chap or pap.
"New VPN
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User" button to add a VPN user account.
DVX IPPBX