（转载）CentOS一键安装pptpd服务脚本

（转载）一键安装pptpd服务

相关代码如下

#!/bin/bash#    Setup Simple PPTP VPN server for CentOS#    Copyright (C) 2015-2016 Danyl Zhang <[e-mail]> and contributors##    This program is free software; you can redistribute it and/or modify#    it under the terms of the GNU General Public License as published by#    the Free Software Foundation; either version 2 of the License, or#    (at your option) any later version.##    This program is distributed in the hope that it will be useful,#    but WITHOUT ANY WARRANTY; without even the implied warranty of#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the#    GNU General Public License for more details.#定义帮助信息函数printhelp() {echo "Usage: ./CentOS-pptp-setup.sh [OPTION]If you are using custom password , Make sure its more than 8 characters. Otherwise it will generate random password for you. If you trying set password only. It will generate Default user with Random password. example: ./CentOS-pptp-setup.sh -u myusr -p mypassUse without parameter [ ./CentOS-pptp-setup.sh ] to use default username and Random password  -u,    --username             Enter the Username  -p,    --password             Enter the Password"}#对输入信息进行判断while [ "$1" != "" ]; do  case "$1" in    -u    | --username )             NAME=$2; shift 2 ;;    -p    | --password )             PASS=$2; shift 2 ;;    -h    | --help )            echo "$(printhelp)"; exit; shift; break ;;  esacdone# Check if user is root，脚本必须在root用户下执行[ $(id -u) != "0" ] && { echo -e "\033[31mError: You must be root to run this script\033[0m"; exit 1; } #定义路径，清空显示屏幕export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/binclear#如果没有curl，就下载它[ ! -e '/usr/bin/curl' ] && yum -y install curl#定义相关变量，下面要用到VPN_IP=`curl ipv4.icanhazip.com`  #通过curl这个地址，可以获取服务器的出口公网IPVPN_LOCAL="192.168.2.1"           #pptp服务器端IP,可以设置为服务器上绑定的任意一个IP地址VPN_REMOTE="192.168.2.10-100"     #客户端成功连接VPN后获取的IP地址范围（可以和pptp服务器在同一内网段内，但是建议不要设置和PPTP服务器内网一样的网段）clear#下面要下载一下安装包，在epel源中，需要先确认epel源的配置if [ -f /etc/redhat-release -a -n "`grep ' 7\.' /etc/redhat-release`" ];then  #判断系统是否为centos7        #CentOS_REL=7    if [ ! -e /etc/yum.repos.d/epel.repo ];then        cat > /etc/yum.repos.d/epel.repo << EOF[epel]name=Extra Packages for Enterprise Linux 7 - \$basearch#baseurl=http://download.fedoraproject.org/pub/epel/7/\$basearchmirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=\$basearchfailovermethod=priorityenabled=1gpgcheck=0EOFfi        for Package in wget make openssl gcc-c++ ppp pptpd iptables iptables-services #下载指定安装包        do                yum -y install $Package        done        echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf  #修改转发设置elif [ -f /etc/redhat-release -a -n "`grep ' 6\.' /etc/redhat-release`" ];then   #如果系统是centos6        #CentOS_REL=6        for Package in wget make openssl gcc-c++ iptables ppp         do                yum -y install $Package        done    sed -i '[e-mail]_forward.*@net.ipv4.ip_forward = 1@g' /etc/sysctl.conf    rpm -Uvh http://poptop.sourceforge.net/yum/stable/rhel6/pptp-release-current.noarch.rpm    yum -y install pptpdelse        echo -e "\033[31mDoes not support this OS, Please contact the author! \033[0m"  #如果是其他系统就提醒并退出        exit 1fisysctl -p  #使转发设置生效#-z检查/etc/pptpf.conf中相关参数是否已经设置了,然后把设置的相关参数导入到/etc/pptpd.conf中[ -z "`grep '^localip' /etc/pptpd.conf`" ] && echo "localip $VPN_LOCAL" >> /etc/pptpd.conf # Local IP address of your VPN server[ -z "`grep '^remoteip' /etc/pptpd.conf`" ] && echo "remoteip $VPN_REMOTE" >> /etc/pptpd.conf # Scope for your home network#检查并设置dns服务器if [ -z "`grep '^ms-dns' /etc/ppp/options.pptpd`" ];then    echo "ms-dns 8.8.8.8" >> /etc/ppp/options.pptpd    echo "ms-dns 209.244.0.3" >> /etc/ppp/options.pptpdfi#no liI10oO chars in passwordLEN=$(echo ${#PASS})  #检查密码是否设置if [ -z "$PASS" ] || [ $LEN -lt 8 ] || [ -z "$NAME"]  #如果密码字符串为0（就是没有设置）或小于8位或跟要设置的用户名相同，那么就重新设置then   P1=`cat /dev/urandom | tr -cd abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789 | head -c 3`   P2=`cat /dev/urandom | tr -cd abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789 | head -c 3`   P3=`cat /dev/urandom | tr -cd abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789 | head -c 3`   PASS="$P1-$P2-$P3"  #生成一个11位的随机密码fiif [ -z "$NAME" ]then   NAME="vpn"   #如果用户名没有设置，就默认为vpnficat >> /etc/ppp/chap-secrets <<END  #将账号密码导出到/etc/ppp/chap-secrets中$NAME pptpd $PASS *ENDETH=`route | grep default | awk '{print $NF}'`   #获取默认的出口网卡名#设置iptables规则[ -z "`grep '1723 -j ACCEPT' /etc/sysconfig/iptables`" ] && iptables -I INPUT 4 -p tcp -m state --state NEW -m tcp --dport 1723 -j ACCEPT  #打开1723端口[ -z "`grep 'gre -j ACCEPT' /etc/sysconfig/iptables`" ] && iptables -I INPUT 5 -p gre -j ACCEPT   #放行gre隧道连接iptables -t nat -A POSTROUTING -o $ETH -j MASQUERADEiptables -I FORWARD -p tcp --syn -i ppp+ -j TCPMSS --set-mss 1356#保存刚才设置的iptables规则，注释掉（删除）相关规则service iptables savesed -i 's@^-A INPUT -j REJECT --reject-with icmp-host-prohibited@#-A INPUT -j REJECT --reject-with icmp-host-prohibited@' /etc/sysconfig/iptables sed -i 's@^-A FORWARD -j REJECT --reject-with icmp-host-prohibited@#-A FORWARD -j REJECT --reject-with icmp-host-prohibited@' /etc/sysconfig/iptables #设置iptables服务重启，开机运行service iptables restartchkconfig iptables on#设置pptpd服务重启，开机运行service pptpd restartchkconfig pptpd onclearecho -e "You can now connect to your VPN via your external IP \033[32m${VPN_IP}\033[0m"echo -e "Username: \033[32m${NAME}\033[0m"echo -e "Password: \033[32m${PASS}\033[0m"

脚本里面的注释内容有一些是我自己加进去的，方便理解。在使用的时候可以直接用wget下载，或者直接去原地址copy

参考地址：
- Centos7搭建pptp VPN一键安装脚本
- CentOS 7 安装VPN Server 和 Client
- Centos下PPTP环境部署记录
- 如何在windows上配置连接pptpd

脚本在github上的地址：https://github.com/DanylZhang/VPS/blob/master/CentOS-pptp-setup.sh
亲测可用，可以放心用啊。