PPTP VPN Server Configuration
The PPTP (Point-To-Point Tunneling Protocol) Server allows to connect securely from a remote location and is built in the DD-WRT firmware (Firmware Version: DD-WRT v24-sp2 (10/06/14) kongac – build 25015M-SP1).
The VPN Server setup is very straightforward and well documented on the dedicated DD-WRT pages.
Works well on the Netgear R6300 V1 model. The remote connection works well on MacOS. iOS 10.0.2 on the iPad and iPhone no longer offers the PPTP VPN client protocol.
Bear in mind that your ISP router may need port forwarding enabled (see related post).
If your ISP uses dynamic IP allocation, you may consider to use a dynamic DNS service on your router (read the DD-WRT pages).