PPTP – Point-to-Point Tunneling Protocol – extends the Point-to-Point Protocol (PPP) standard for traditional dial-up networking. Which enables the secure transfer of data from a remote client to a private enterprise server by creating a virtual private network (VPN) across TCP/IP-based data networks. PPTP supports on-demand, multi-protocol, virtual private networking over public networks, such as the Internet.
PPTP and PPTPD installation on cpanel servers
1) Install PPP.
yum install ppp
2) Download the appropriate RPM from here (select the required version of your centOS version).
wget http://poptop.sourceforge.net/yum/stable/rhel5/x86_64/pptpd-1.3.4-2.rhel5.x86_64.rpm
3)Install the RPM.
rpm -ivh pptpd-1.3.4-2.rhel5.x86_64.rpm
4) Edit the file /etc/pptd.conf.
vim /etc/pptpd.conf
Add the following lines to the files at the end.
localip xx.xx.xx.xx remoteip xx.xx.xx.xx
5) Second configuration file to be edited is /etc/ppp/options.pptpd
vim /etc/ppp/options.pptpd
Set DNS at ms-dns lines
ms-dns 8.8.8.8 ms-dns 8.8.4.4
6) Edit the file /etc/ppp/chap-secrets to add users.
vim /etc/ppp/chap-secrets
#secrets for authenticaion using CHAP #client server secret IP addresses username pptpd password *
Firewall configuration
7) Edit /etc/sysctl.conf .
vim /etc/sysctl.conf
Enable IP forwarding by editing the following line
net.ipv4.ip_forward=1
8) Load in sysctl settings from the file /etc/sysctl.conf
/sbin/sysctl -p
9) Configuring IPtables for NAT
/sbin/service iptables start /sbin/iptables -t nat -A POSTROUTING -o eth0 -s xx.xx.xx.xx/xx -j MASQUERADE service iptables save Restart the pptp service /sbin/sevice pptpd start ckhkconfig pptpd on csf -r
That’s all !!
