====== VPN setting in UBUNTU for Windows ======

install pptp

$ sudo apt-get instal pptp

insert line in /etc/pptpd.conf

localip 192.168.0.1
remoteip 192.168.0.2-10


dns setting

insert line into /etc/ppp/options.pptpd

ms-dsn 8.8.8.8


add account

insert line into /etc/ppp/chap-secrets
user-account <tab> pptp <tab> password <tab> *


nat setting

/etc/sysctl.conf net.ipv4.ip_forward = 1

echo 1 > /proc/sys/net/ipv4/ip_forward

iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE

iptables -t nat -A POSTROUTING -s 10.8.0.0/255.255.255.0 -o eth0 -j MASQUERADE