Draytek Vigor 2925 Series User Manual page 319

WAN1 First/ WAN2 First/ WAN3 First - While
connecting, the router will use WAN1/WAN2/WAN3
as the first channel for VPN connection. If
WAN1/WAN2/WAN3 fails, the router will use
another WAN interface instead.
WAN1 Only /WAN2 Only/WAN 3 Only- While
connecting, the router will use WAN1/WAN2/WAN3
as the only channel for VPN connection.
WAN1 Only: Backup WAN2/WAN2 Only: Backup
WAN1 - While connecting, the router will use
WAN1/WAN2 as the only channel for VPN
connection. If WAN1/WAN2 fails, the router will use
backup WAN2/backup WAN1 interface instead.
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-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
307 Vigor2925 Series User's Guide