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pptp.sh

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+#!/bin/bash
+PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
+export PATH
+#===================================================================
+#   SYSTEM REQUIRED:  CentOS 6 (32bit/64bit)
+#   DESCRIPTION:  Auto install pptpd for CentOS 6
+#   Author: Teddysun <i@teddysun.com>
+#===================================================================
+
+if [[ "$USER" != 'root' ]]; then
+    echo "Sorry, you need to run this as root"
+    exit 1
+fi
+
+if [[ ! -e /dev/net/tun ]]; then
+    echo "TUN/TAP is not available"
+    exit 1
+fi
+
+cur_dir=`pwd`
+clear
+echo ""
+echo "#############################################################"
+echo "# Auto Install PPTP for CentOS 6"
+echo "# System Required: CentOS 6(32bit/64bit)"
+echo "# Intro: http://teddysun.com/134.html"
+echo ""
+echo "# Author: Teddysun <i@teddysun.com>"
+echo ""
+echo "#############################################################"
+echo ""
+
+# Remove installed pptpd & ppp
+yum remove -y pptpd ppp
+iptables --flush POSTROUTING --table nat
+iptables --flush FORWARD
+rm -f /etc/pptpd.conf
+rm -rf /etc/ppp
+arch=`uname -m`
+
+# Download pptpd
+if [ -s pptpd-1.3.4-2.el6.$arch.rpm ]; then
+  echo "pptpd-1.3.4-2.el6.$arch.rpm [found]"
+else
+  echo "pptpd-1.3.4-2.el6.$arch.rpm not found!!!download now......"
+  if ! wget http://lamp.teddysun.com/files/pptpd-1.3.4-2.el6.$arch.rpm;then
+    echo "Failed to download pptpd-1.3.4-2.el6.$arch.rpm,please download it to $cur_dir directory manually and rerun the install script."
+    exit 1
+  fi
+fi
+
+# Install some necessary tools
+yum -y install net-tools make libpcap iptables gcc-c++ logrotate tar cpio perl pam tcp_wrappers dkms ppp
+rpm -ivh pptpd-1.3.4-2.el6.$arch.rpm
+
+rm -f /dev/ppp
+mknod /dev/ppp c 108 0
+echo 1 > /proc/sys/net/ipv4/ip_forward
+echo "mknod /dev/ppp c 108 0" >> /etc/rc.local
+echo "echo 1 > /proc/sys/net/ipv4/ip_forward" >> /etc/rc.local
+echo "localip 192.168.8.1" >> /etc/pptpd.conf
+echo "remoteip 192.168.8.2-254" >> /etc/pptpd.conf
+echo "ms-dns 8.8.8.8" >> /etc/ppp/options.pptpd
+echo "ms-dns 8.8.4.4" >> /etc/ppp/options.pptpd
+
+pass=`openssl rand 6 -base64`
+if [ "$1" != "" ]
+  then pass=$1
+fi
+
+echo "vpn pptpd ${pass} *" >> /etc/ppp/chap-secrets
+
+iptables -t nat -A POSTROUTING -s 192.168.8.0/24 -j SNAT --to-source `ifconfig  | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk 'NR==1 { print $1}'`
+iptables -A FORWARD -p tcp --syn -s 192.168.8.0/24 -j TCPMSS --set-mss 1356
+service iptables save
+chkconfig --add pptpd
+chkconfig pptpd on
+service iptables restart
+service pptpd start
+
+echo ""
+echo "VPN service is installed, your VPN username is vpn, VPN password is ${pass}"
+echo "Welcome to visit: http://teddysun.com"
+echo ""
+
+exit 0