Draytek Vigor2912 Series User Manual page 273

Mutual Authentication
(PAP)
Assigned IP Start
LDAP Server Profiles for
PPP Authentication
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 Username
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. You
should choose an IP address from the local private network.
For example, if the local private network is
192.168.1.0/255.255.255.0, you could choose
192.168.1.200 as the Start IP Address.
Configured LDAP profiles will be listed under such item.
Simply check the one you want to enable the PPP
authentication by LDAP server profiles.
However, if there is no profile listed, simply click the link
of PPTP LDAP Profile to create/add some new LDAP
profiles you want.
263 Vigor2912 Series User's Guide