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Vigor2800 Series User’s Guide
85
Normally, if any one of VPN peers wants to disconnect
the connection, it should follow a serial of packet
exchange procedure to inform each other. However, if the
remote peer disconnect without notice, Vigor router will
by no where to know this situation. To resolve this
dilemma, by continuously sending PING packets to the
remote host, the Vigor router can know the true existence
of this VPN connection and react accordingly. This is
independent of DPD (dead peer detection).
ISDN Build ISDN LAN-to-LAN connection to remote network. You
should set up Link Type and identity like User Name and
Password for the authentication of remote server. You can
further set up Callback (CBCP) function below. This feature is
useful for i model only.
PPTP Build a PPTP VPN connection to the server through the
Internet. You should set the identity like User Name and
Password below for the authentication of remote server.
IPSec Tunnel Build an IPSec VPN connection to the server through Internet.
L2TP with … Build a L2TP VPN connection through the Internet. You can
select to use L2TP alone or with IPSec. Select from below:
None: Do not apply the IPSec policy. Accordingly, the VPN
connection employed the L2TP without IPSec policy can be
viewed as one pure L2TP connection.
Nice to Have: Apply the IPSec policy first, if it is applicable
during negotiation. Otherwise, the dial-out VPN connection
becomes one pure L2TP connection.
Must: Specify the IPSec policy to be definitely applied on the
L2TP connection.
User Name This field is applicable when you select ISDN, PPTP or L2TP
with or without IPSec policy above.
Password This field is applicable when you select ISDN, PPTP or L2TP
with or without IPSec policy above.
PPP Authentication This field is applicable when you select ISDN, PPTP or L2TP
with or without IPSec policy above. PAP/CHAP is the most
common selection due to wild compatibility.
VJ compression This field is applicable when you select ISDN, PPTP or L2TP
with or without IPSec policy above. VJ Compression is used
for TCP/IP protocol header compression. Normally set to Yes
to improve bandwidth utilization.
IKE Authentication
Method
This group of fields is applicable for IPSec Tunnels and L2TP
with IPSec Policy.
Pre-Shared Key-Input 1-63 characters as pre-shared key.
Digital Signature (X.509) - Select one predefined in the
X.509 Peer ID Profiles.
IPSec Security Method This group of fields is a must for IPSec Tunnels and L2TP
with IPSec Policy.
Medium Authentication Header (AH) means data will be
authenticated, but not be encrypted. By default, this option is
active.