apt-get install ssh pptpd -y
vi /etc/pptpd.conf
localip xxxxx
remoteip 192.168.2.2-238,192.168.2.245
vi /etc/ppp/chap-secrets
noni pptpd pass "*"
/etc/init.d/pptpd restart
vi /etc/sysctl.conf
net.ipv4.ip_forward=1
/sbin/iptables -P FORWARD ACCEPT
iptables -t nat -A POSTROUTING -j SNAT --to-source xx.xx.xx.xx
apt-get install bind9 -y
/etc/init.d/bind9 start