Vigor2920 Series User’s Guide
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Available settings are explained as follows:
Item Description
Dial-In PPP
Authentication
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.
Dial-In PPP Encryption
(MPPE Optional MPPE
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.
Mutual Authentication
(PAP)
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.
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