Asus RT-AC68U - Manual (Page 76)

4.5 VPN Server
VPN (Virtual Private Network) provides a secure communication
to a remote computer or remote network using a public network
such as the Internet.
NOTE: Before setting up a VPN connection, you would need the IP
address or domain name of the VPN server you are trying to access.
To set up access to a VPN server:
1. From the navigation panel, go to Advanced Settings > VPN
Server.
2. On the Enable PPTP Server field, select Yes.
3. On the Network Place (Samba) Support field, select Yes.
4. Enter the user name and password for accessing the VPN
server. Click the button.
5. Click Apply.
NOTE: For advanced VPN server settings, click the VPN Server tab to
configure broadcast support, authentication, MPPE Encryption, and
Client IP address range.