How To Install PPTP VPN On Centos 7 ?

Lazy mode<<<<<<<

rpm -Uvh http://download.fedoraproject.org/pub/epel/beta/7/x86_64/epel-release-7-1.noarch.rpm
yum -y install ppp pptpd

cp /etc/pptpd.conf /etc/pptpd.conf.bak
cat >/etc/pptpd.conf<<EOF
option /etc/ppp/options.pptpd
logwtmp
localip 10.0.10.1
remoteip 10.0.10.2-254
EOF

cp /etc/ppp/options.pptpd /etc/ppp/options.pptpd.bak
cat >/etc/ppp/options.pptpd<<EOF
name pptpd
refuse-pap
refuse-chap
refuse-mschap
require-mschap-v2
require-mppe-128
proxyarp
lock
nobsdcomp
novj
novjccomp
nologfd
ms-dns 8.8.8.8
ms-dns 8.8.4.4
EOF

cp /etc/ppp/chap-secrets /etc/ppp/chap-secrets.bak
cat >/etc/ppp/chap-secrets<<EOF
USERNAME pptpd PASSWORD *
EOF

cp /etc/sysctl.conf /etc/sysctl.conf.bak
cat >/etc/sysctl.conf<<EOF
net.core.wmem_max = 12582912
net.core.rmem_max = 12582912
net.ipv4.tcp_rmem = 10240 87380 12582912
net.ipv4.tcp_wmem = 10240 87380 12582912
net.core.wmem_max = 12582912
net.core.rmem_max = 12582912
net.ipv4.tcp_rmem = 10240 87380 12582912
net.ipv4.tcp_wmem = 10240 87380 12582912
net.core.wmem_max = 12582912
net.core.rmem_max = 12582912
net.ipv4.tcp_rmem = 10240 87380 12582912
net.ipv4.tcp_wmem = 10240 87380 12582912
net.ipv4.ip_forward = 1
EOF
sysctl -p


chmod +x /etc/rc.d/rc.local
echo "iptables -t nat -A POSTROUTING -s 10.0.10.0/24 -o eth0 -j MASQUERADE" >> /etc/rc.d/rc.local
iptables -t nat -A POSTROUTING -s 10.0.10.0/24 -o eth0 -j MASQUERADE

systemctl start pptpd
systemctl enable pptpd.service

CentOS 7 testing through on DigitalOcean<<<<<<<

To install PPTP on Centos 7, simply run:

yum install ppp pptp pptp-setup

Then you can follow the configuration steps laid out in this article. Even though it is written from CentOS 6, it should be largely the same:

How To Setup Your Own VPN With PPTP