D-Link DWM-312W User Manual page 38

Section 4 - Configuration
PPTP
Without Enable this setting to connect without a username
authorization and password. This configuration is uncommon and is
disabled by default.
Username If Without authorization is disabled, specify the PPP
username provided by your ISP
Password If Without authorization is disabled, specify the PPP
password provided by your ISP.
VPN server
Specify the VPN server address provided by your ISP.
address
MTU
Specify the Maximum Transmission Unit of your Internet
connection. You may need to change the MTU for optimal
performance with your ISP. The default setting is 1456.
Encryption Choose No Encryption, MPPE 40 125 bit, MPPE 40 bit, or
protocol MPPE 128 bit.
Authentication Choose from AUTO, PAP, CHAP, MS-CHAP, or MS-CHAPv2.
protocol AUTO is selected by default.
Keep Alive Toggle this switch to maintain your connection when no
activity is detected
For the remainder of the PPTP configuration options, refer to pages
30-32.
D-Link DWM-312W User Manual 34