User`s guide

Vigor2110 Series User’s Guide
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connection has been idled over the value, the router will drop
the connection.
Enable PING to keep alive This function is to help the router to determine the status of
IPSec VPN connection, especially useful in the case of
abnormal VPN IPSec tunnel disruption. For details, please refer
to the note below. Check to enable the transmission of PING
packets to a specified IP address.
PING to the IP Enter the IP address of the remote host that located at the
other-end of the VPN tunnel.
Enable PING to Keep Alive is used to handle abnormal
IPSec VPN connection disruption. It will help to provide
the state of a VPN connection for router’s judgment of
redial.
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).
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, PPTP or L2TP with or
without IPSec policy above.
Password This field is applicable when you select PPTP or L2TP with or
without IPSec policy above.
PPP Authentication This field is applicable when you select, 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 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.