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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:
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<<<<<<<
@JetsoX Shall we use firewalld instead of iptables in CentOS 7 ?
@liweijian Please see the following reference:
#!/bin/sh
# firewalld
zone=public
firewall-cmd --permanent --new-service=pptp
cat >/etc/firewalld/services/pptp.xml<<EOF
<?xml version="1.0" encoding="utf-8"?>
<service>
<port protocol="tcp" port="1723"/>
</service>
EOF
firewall-cmd --permanent --zone=$zone --add-service=pptp
firewall-cmd --permanent --zone=$zone --add-masquerade
firewall-cmd --reload
http://bilibi.li/how-to-setup-l2tp-on-digitalocean/
good one....