Installing and Configuring PPTP VPN on RHEL/CentOS 5

rpm -Uvh http://poptop.sourceforge.net/yum/stable/packages/pptp-release-4-6.rhel5.noarch.rpm


########################

yum install ppp pptpd



########################
vi /etc/pptpd.conf


localip <IP> ///////////////localip 202.51.177.3   (server IP eth0)
remoteip <client IP>////////remoteip 10.10.4.1-100
save and exit


##############################
vi /etc/ppp/options.pptpd


find ms-dns////////////// ms-dns 202.51.183.6
here put your dnsip
save and exit


#####################################
vi /etc/ppp/chap-secrets


pptpuser      *    pptpuser-password    *   //////soikot * 123456 *

if you bind ip address who will be able to connect then give IPaddress in place of second *
save and exit



####################################
/etc/init.d/pptpd restart



###########################
vi /etc/sysctl.conf

And set

net.ipv4.ip_forward = 1



################################################################################
configure your firewall (IPTABLES) as your requirment but must have to put

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE



you may use this site as reference


http://www.gaggl.com/2012/06/installing-poptop-pppd-vpn-serveron-centos-6/


############################
chkconfig pptpd on

Reboot server

#########################################################
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

/etc/init.d/pptpd start