This installation package of PPTPD truly supports the entire Centos series, including Centos5, Centos6 and Centos7. It doesn't matter whether it is openvz or kvm.

Special attention :

centos7 will automatically disable the default firewall and install iptables. So if you have special needs, don't touch it. When installing Fuqiang, it will automatically add the yum source of epel. If you have mysophobia or special needs, please note that when installing Fuqiang, it will automatically uninstall the previously installed ppp and pptpd, so even if you want to reinstall it, you don't need to uninstall it manually

Installation command :
wget https://zhujiwiki.com/wp-content/uploads/2016/03/vpn_centos_pptpd.sh && bash vpn_centos_pptpd.sh

Add VPN account
1. bash vpn_centos_pptpd.sh
Select 2 to add a VPN account

2. Edit /etc/ppp/chap-secrets

vi /etc/ppp/chap-secrets

Add a VPN user, the format is: Username pptpd Password*

via:91yun