Ppp General Setup - Draytek Vigor2820 Series User Manual

3 . 9 . 2 P P P G e
3 . 9 . 2 P P P G e
This submenu only applies to PPP-related VPN connections, such as PPTP, L2TP, L2TP over
IPSec.
Dial-In PPP
Authentication PAP
Only
PAP or CHAP
Dial-In PPP Encryption
(MPPE Optional MPPE
Mutual Authentication
(PAP)
Vigor2820 Series User's Guide
n e r a l S e t u p
n e r a l S e t u p
Select this option to force the router to authenticate dial-in users
with the PAP protocol.
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.
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.
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