@ Iashanw,
Login to the Web UI->Advanced-->VPN Server->Check Enable VPN server.
Compared to PPTP, IPSec is more secured, so you can go with that.
VPN Type--> IPSec Server --> Pre-Shared key (This should be 8 characters long)-> Local Endpoint-Address (WAN IP Address), don't change any thing under (Local IP Address). Now we have to create the VPN user by entering the username and password, and under IP Address you can enter any local IP address like 10.10.10.100 or 192.168.1.120, save the settings.
Once you complete the above steps, the VPN server is created on the Almond+. Next, depending upon the client devices, you can connect to the VPN server from any where else and access the resources connected to your network.
If you need any assistance on how to connect to the VPN connection on your client device, let me know what device you are using, so that accordingly I could provide the instructions.
Note: VPN Server works only in Router mode and it has to receive the WAN IP address.