User`s manual

Multi-WAN VPN QoS Router
141
● Moreover, the exchange strings for ―Incoming SPI‖ and ―Outgoing SPI‖ must be
identical to those of the connected VPN device. For the Incoming SPI parameters,
users must set it the same with the Outgoing SPI string of the remote VPN device.
And the Outgoing SPI string must be the same with the incoming SPI string of the
remote VPN device.
Advanced Setting- for IKE Preshareed Key Only
The advanced settings include Main Mode and Aggressive mode. For the Main mode, the
default setting is set to VPN operation mode. The connection is the same to most of the VPN
devices.
● 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 tunnel 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