D-Link DVX-2002F User Manual page 96

Enable mppe128:Microsoft Point-to-Point Encryption (MPPE) encrypts data in Point-to-Point

Protocol (PPP)-based dial-up connections or Point-to-Point Tunneling Protocol (PPTP) virtual
private network (VPN) connections with 128-bit key.
Debug:Tick to enable debug for PPTP VPN connection, debug information will be written

into system logs.
You will need to create a VPN user account for aVPN client to be able to connect to the VPN
Server.
To create an account, click
a VPN user account.
Now the PPTP VPN client will be able to connect to the PPTP VPN server.
Notice:
If the DVX IPPBX system is behind NAT, you will need to open ports 1723 on the router/firewall.
PPTP VPN Client
To create your VPN client at the branch office site, open the DVX IPPBX web GUI and navigate to
Network Settings->VPN
web menu
client.
Enable: Tick to enable PPTP VPN client.

Enable 40/148-bit encryption for

(strong) MPPE encryption schemes.
Server Address:PPTP VPN server public IP.

Username:PPTP VPN user name given by the VPN server.

"VPN User Management" tab and click
Client. Check the radio button of PPTP to configure PPTP VPN
MPPE: Tick to enable 40-bit key (standard) or 128-bit key
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DVX IPPBX
"New VPN User" button to add