Configure an PPTP Server on Debian

1. 安装PPTP

   apt-get update

   apt-get upgrade

   apt-get install iptables pptpd vim

2. 设置并修改配置文件
   vim /etc/pptpd.conf

   localip 10.0.0.1

   remoteip 10.0.0.100-200

   添加VPN账号密码
   vim /etc/ppp/chap-secrets

   添加DNS服务器IP
   vim /etc/ppp/pptpd-options
   ms-dns 8.8.8.8
   ms-dns 8.8.4.4

   修改/etc/sysctl.conf
   net.ipv4.ip_forward = 1
   sysctl –p
   iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE && iptables-save
   iptables –L
   iptables-save > /etc/iptables.up.rules (重启生效)

   vim /etc/network/interfaces
   auto lo
   iface lo inet loopback
   pre-up iptables-restore < /etc/iptables.up.rules

   重启pptpd服务
   service pptpd restart

   备注：提示安装不了pptpd
   vim /etc/apt/sources.list
   deb http://ftp.debian.org/debian/ squeeze main contrib non-free
   deb-src http://ftp.debian.org/debian/ squeeze main contrib non-free
   apt-get update

   PC端可以上网，手机无法上网
   往/etc/ppp/peers/testdb文件添加一行require-mppe-128

   参考链接：
   https://www.digitalocean.com/community/tutorials/how-to-setup-your-own-vpn-with-pptp