Planet MH-2300 User Manual page 372

If VPN is selected from the Interface drop-down list, the user must enter the local
LAN IP address in the Interface field. Enter the IP address that is under the same
subnet range in the Destination IP / Domain name field.
When the VPN connection is established between the local subnet
(192.168.189.x/24) and remote subnet (192.168.169.x/24), the following
method can be employed to test the packet transfer between the two
subnets.
Gigabit Multi-Homing VPN Security Gateway
The Ping Results of a Host
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MH-2300