User`s guide

Vigor2820 Series User’s Guide
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the first channel for VPN connection. If WAN2 fails, the router
will use another WAN interface instead.
WAN2 Only - While connecting, the router will use WAN2 as
the only channel for VPN connection.
Netbios Naming Packet Pass – click it to have an inquiry for data transmission between
the hosts located on both sides of VPN Tunnel while connecting.
Block – When there is conflict occurred between the hosts on
both sides of VPN Tunnel in connecting, such function can
block data transmission of Netbios Naming Packet inside the
tunnel.
Multicast via VPN Some programs might send multicast packets via VPN
connection.
Pass – Click this button to let multicast packets pass through
the router.
Block – This is default setting. Click this button to let multicast
packets be blocked by the router.
Call Direction Specify the allowed call direction of this LAN-to-LAN profile.
Both:-initiator/responder
Dial-Out- initiator only
Dial-In- responder only.
Always On or Idle Timeout Always On-Check to enable router always keep VPN
connection.
Idle Timeout: The default value is 300 seconds. If the
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).
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 s model only.