Login to your Asus router (http://router.asus.com/). Proceed to Advanced Settings and then click VPN.
Click on the VPN Client tab.
Click on Add Profile.
Choose L2TP at the top tabs and then enter the following settings:
Description: (any name would do)
VPN Server: se-sto.pvdata.host
*you'll find the server list here.
Username: (your PrivateVPN registered email address)
Password: (your password)
Click OK.
Click Activate to connect.