Linux系统VPN北京IDC机房机柜租用价格用户安装PPTP有一定的难度，这里北京北京IDC机房机柜租用价格网-北京IDC机房机柜租用价格专家为大家介绍一个比较简单的方法
通过SSH CLIENT登录到服务器上，一般将需要执行的脚本整体放在/usr/local/src下执行步骤如下：
一、进入目录并下载相关的脚本
#cd /usr./local/src
#wget http://www.hi-vps.com/shell/vpn_centos6.sh –下载相关的脚本
#chmod a+x vpn_centos6.sh –增加脚本的执行权限
二、安装Centos6.X PPTPVPN脚本
#bash vpn_centos6.sh
执行完后有1、2、3种英文，对应如下中文意思。
1. 安装VPN服务
2. 修复VPN相关服务
3. 添加VPN普通登录用户
我们要安装成为PPTP VPN服务器，当然输入1–>然后enter键了。静心等待安装完成后，就会出现账号和密码啦，默认账号是vpn，密码是一串随机数字，一般来说根据自己的实际应该去设置密码。安装完成如下：
DKMS: add Completed.
Module build for the currently running kernel was skipped
since the kernel source for this kernel does not seem to be
installed.
kernel_ppp_mppe-1.0.2-3dkms.noarch
warning: ppp-2.4.5-17.0.rhel6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 862acc42: NOKEY
Preparing… ########################################### [100%]
1:ppp ########################################### [100%]
warning: pptpd-1.3.4-2.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 862acc42: NOKEY
Preparing… ########################################### [100%]
1:pptpd ########################################### [100%]
mknod: “/dev/ppp”: 文件已存在
iptables: Saving firewall rules to /etc/sysconfig/iptables:[ OK ]
Starting pptpd: [ OK ]
VPN service is installed, your VPN username is vpn, VPN password is 7OXoJ0V1
三、关于脚本的说明及设置注意事项
1、用vim编辑器打开后再用set num设置显示行号后内容如下
1.#!/bin/bash
2.#
3.# Author: yeho
4.# Blog: https://blog.linuxeye.com
5.#
6.# Installs a PPTP VPN-only system for CentOS
7.
8.# Check if user is root
9.[ $(id -u) != “0” ] && { echo -e “ 33[31mError: You must be root to run this script 33[0m”; exit 1; }
10.
11.export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
12.clear
13.printf “
14.#######################################################################
15.# LNMP/LAMP/LANMP for CentOS/RadHat 5+ Debian 6+Ubuntu 12+ #
16.# Installs a PPTP VPN-only system for CentOS #
17.# For more information please visit https://blog.linuxeye.com/31.html #
18.#######################################################################
19.”
20.
21.[ ! -e /usr/bin/curl’ ] && yum -y install curl
22.
23.VPN_IP=`curl ipv4.icanhazip.com`
24.
25.VPN_USER=”enkj” –设置VPN用户的用户名
26.VPN_PASS=”enkj..com” –设置VPN用户的密码
27.
28.VPN_LOCAL=”192.168.0.150″ –本机的IP地址
29.VPN_REMOTE=”192.168.0.151-200″ –VPN连接后分配的IP地址
30.
31.
32.while :; do echo
33. read -p “Please input username: ” VPN_USER
34. [ -n “$VPN_USER” ] && break
35.done
36.
37.while :; do echo
38. read -p “Please input password: ” VPN_PASS
39. [ -n “$VPN_PASS” ] && break
40.done
41.clear
42.
43.
44.if [ -f /etc/redhat-release -a -n “`grep ‘ 7.’ /etc/redhat-release`” ];then
45. #CentOS_REL=7
46. if [ ! -e /etc/yum.repos.d/epel.repo ];then
47. cat > /etc/yum.repos.d/epel.repo
48.[epel]
49.name=Extra Packages for Enterprise Linux 7 – $basearch
50.#baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch
51.mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch
52.failovermethod=priority
53.enabled=1
54.gpgcheck=0
55.EOF
56. fi
57. for Package in wget make openssl gcc-c++ ppp pptpd iptables iptables-services
58. do
59. yum -y install $Package
60. done
61. echo ‘net.ipv4.ip_forward = 1’ >> /etc/sysctl.conf
62.elif [ -f /etc/redhat-release -a -n “`grep ‘ 6.’ /etc/redhat-release`” ];then
63. #CentOS_REL=6
64. for Package in wget make openssl gcc-c++ iptables ppp
65. do
66. yum -y install $Package
67. done
68. sed -i ‘s@net.ipv4.ip_forward.*@net.ipv4.ip_forward = 1@g’ /etc/sysctl.conf
69. rpm -Uvh http://poptop.sourceforge.net/yum/stable/rhel6/pptp-release-current.noarch.rpm
70. yum -y install pptpd
71.else
72. echo -e “ 33[31mDoes not support this OS, Please contact the author! 33[0m”
73. exit 1
74.fi
75.
76.echo “1” > /proc/sys/net/ipv4/ip_forward －－启动内核的NAT功能
77.
78.sysctl -p /etc/sysctl.conf –生效此功能
79.
80.[ -z “`grep ‘^localip’ /etc/pptpd.conf`” ] && echo “localip $VPN_LOCAL” >> /etc/pptpd.conf # Local IP address of your VPN server
81.[ -z “`grep ‘^remoteip’ /etc/pptpd.conf`” ] && echo “remoteip $VPN_REMOTE” >> /etc/pptpd.conf # Scope for your home network
82.[ -z “`grep ‘^stimeout’ /etc/pptpd.conf`” ] && echo “stimeout 172800” >> /etc/pptpd.conf
83.
84.if [ -z “`grep ‘^ms-dns’ /etc/ppp/options.pptpd`” ];then
85. cat >> /etc/ppp/options.pptpd
86.ms-dns 223.5.5.5 # Aliyun DNS Primary –DNS设置
87.ms-dns 114.114.114.114 # 114 DNS Primary –DNS设置
88.ms-dns 8.8.8.8 # Google DNS Primary –DNS设置
89.ms-dns 209.244.0.3 # Level3 Primary –DNS设置
90.ms-dns 208.67.222.222 # OpenDNS Primary –DNS设置
91.EOF
92.fi
93.
94.echo “$VPN_USER pptpd $VPN_PASS *” >> /etc/ppp/chap-secrets
95.
96.ETH=`route | grep default | awk ‘{print $NF}’`
97.[ -z “`grep ‘1723 -j ACCEPT’ /etc/sysconfig/iptables`” ] && iptables -I INPUT 4 -p tcp -m state –state NEW -m tcp –dport 1723 -j ACCEPT
98.[ -z “`grep ‘gre -j ACCEPT’ /etc/sysconfig/iptables`” ] && iptables -I INPUT 5 -p gre -j ACCEPT
99.iptables -t nat -A POSTROUTING -o $ETH -j MASQUERADE
100.iptables -I FORWARD -p tcp –syn -i ppp+ -j TCPMSS –set-mss 1356
101.service iptables save
102.sed -i ‘s@^-A INPUT -j REJECT –reject-with icmp-host-prohibited@#-A INPUT -j REJECT –reject-with icmp-host-prohibited@’ /etc/sysconfig/iptables
103.sed -i ‘s@^-A FORWARD -j REJECT –reject-with icmp-host-prohibited@#-A FORWARD -j REJECT –reject-with icmp-host-prohibited@’ /etc/sysconfig/iptables
104.service iptables restart
105.chkconfig iptables on
106.
107.service pptpd restart –启动服务
108.chkconfig pptpd on –设置服务开机启动
109.clear
110.
111.echo -e “You can now connect to your VPN via your external IP 33[32m${VPN_IP} 33[0m”
112.
113.echo -e “Username: 33[32m${VPN_USER} 33[0m”
114.echo -e “Password: 33[32m${VPN_PASS} 33[0m”
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