VigorBX 2000 Series User’s Guide
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This submenu only applies to PPP-related VPN connections, such as PPTP, L2TP, L2TP over
IPsec.
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/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.
Dial-In PPP Encryption
(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.
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