Draytek Vigor2762 series User Manual page 205

Item
Dial-In PPP Authentication
Dial-In PPP Encryption
(MPPE)
Mutual Authentication
(PAP)
IP Address Assignment for
Dial-In Users (when DHCP
Disable set)
Vigor2762 Series User's Guide
Description
PAP Only - elect this option to force the router to
authenticate dial-in users with the PAP protocol.
PAP/CHAP/MS-CHAP/MS-CHAPv2 - Selecting this option
means the router will attempt to authenticate dial-in users
with the CHAP protocol first. If the dial-in user does not
support this protocol, it will fall back to use the PAP
protocol for authentication.
Optional MPPE - This option represents that the MPPE
encryption method will be optionally employed in the
router for the remote dial-in user. If the remote dial-in user
does not support the MPPE encryption algorithm, the router
will transmit "no MPPE encrypted packets". Otherwise, the
MPPE encryption scheme will be used to encrypt the data.
Require MPPE (40/128bits) - Selecting this option will

force the router to encrypt packets by using the MPPE
encryption algorithm. In addition, the remote dial-in
user will use 40-bit to perform encryption prior to
using 128-bit for encryption. In other words, if 128-bit
MPPE encryption method is not available, then 40-bit
encryption scheme will be applied to encrypt the data.
Maximum MPPE - This option indicates that the router

will use the MPPE encryption scheme with maximum
bits (128-bit) to encrypt the data.
The Mutual Authentication function is mainly used to
communicate with other routers or clients who need bi-
directional authentication in order to provide stronger
security, for example, Cisco routers. So you should enable
this function when your peer router requires mutual
authentication. You should further specify the User Name
and Password of the mutual authentication peer.
The length of the name/password is limited to 23/19
characters.
Enter a start IP address for the dial-in PPP connection for
LAN1.
LAN2 will be available if it is enabled. Refer to
LAN>>General Setup for enabling the LAN interface.
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