Ppp General Setup - Draytek Vigor 2110 User Manual

4 . 9 . 2 P P P G e n e r a
4 . 9 . 2 P P P G e n e r a
This submenu only applies to PPP-related VPN connections, such as PPTP, L2TP, and L2TP
over IPSec.
Available settings are explained as follows:
Item
Dial-In PPP
Authentication
Dial-In PPP Encryption
(MPPE Optional MPPE
l S e t u p
l S e t u p
Description
PAP Only - elect this option to force the router to
authenticate dial-in users with the PAP protocol.
PAP or CHAP - 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.
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Vigor2110 Series User's Guide