D-Link DIR-410 User Manual page 55

1. VPN-L2TP Server: Click "enable" to enable the function of VPN-L2TP Server.
2. Server Virtual IP: The IP address of L2TP server. This IP address should be different
from IP address of PPTP server and LAN subnet of VPN gateway.
3. IP Pool Start Address: The start virtual IP Address that sends to the client.
4. IP Pool End Address: The end virtual IP Address that sends to the client.
5. Authentication Protocal: User can choose authentication protocol such as PAP,
CHAP,MS_CHAP and MS_CHAPv2.
6. MPPE Encryption Mode: Click checkbox to enable MPPE Encryption Mode. Please
note that MPPE needs to work with MSCHAP authentication method.
7. Encryption length: There are three kinds of encryption length, respectively 40 bits, 56
bits, and 128 bits.
8. User Name: Input the account of L2TP client.
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