User`s manual

Multi-WAN VPN QoS Router
147
The advanced settings include Main Mode and Aggressive mode. In Main mode, the default
setting is VPN operation mode. The connection is the same as most of the VPN device.
● Aggressive Mode: This mode is mostly adopted by remote devices. The IP connection
is designed to enhance the security control if dynamic IP is used for connection.
● Use IP Header Compression Protocol: If this option is selected, in the connected VPN
tunnel, the device supports IP Payload compression Protocol.
● Keep Alive: If this option is selected, VPN channel will keep this VPN connection. This
is mostly used to connect the remote node of the branch office and headquarter or
used for the remote dynamic IP address.
● AH Hash Calculation: For AH (Authentication Header), users may select
MD5/DSHA-1.
● NetBIOS Broadcast: If this option is selected, the connected VPN tunnel allows the
passage of NetBIOS broadcast packet. This facilitates the easy connection with other
Microsoft Network Neighborhoods; however, the traffic using this VPN tunnel will
increase.
● Dead Peer Detection (DPD): If this option is selected, the connected VPN tunnel will
regularly transmit HELLO/ACK message packet to detect whether there is connection
between the two ends of the VPN tunnel. If one end is disconnected, the device will
disconnect the tunnel automatically and then create new connection. Users can
define the transmission time for each DPD message packet, and the default value is
10 seconds
10.1.3. PPTP Setting
It supports the PPTP of Window XP/ 2000 to create point-to-point tunnel protocol for single-
device users to create VPN connection.