Step1: At first click PPP then click interface then click PPTP Server then click Enable > Apply > OK
Step2: PPP > Secrets + Name=test2, password=test , profile= defaultencryption, Local address=192.168.5.1(must be other end Gateway), Remote address=192.168.5.100 (any private IP Local site) > Apply >OK
Dial up create for windows PC: Open Network and Sharing Center > Setup a new connection or Network > Connect to workplace > Next > use my internet connection (VPN) click > Internet address = Real IP > Next >connect ( finished ): Step by Step figure has given below
Click set up a new connection or network , VPN connection> then click connected to a workplace then click next.
Click connect to workplace then fill up internet address such as (43.224117.198) must be real IP
then click next.
Click Open Network and Sharing Center then click Change adapter settings then click VPN connection then put user name and password then click connect >ok
you can see the video for better understand
https://www.youtube.com/watch?v=c1wGbH4OMnE
http://greentechrevolution.com/vpn-configure/