CentOS 6.5 Example of a VPN environment (Digitalocean host)

Script

The code is as follows

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#!/bin/bash function Installvpn () { echo "Begin to install VPN services"; #check Wether VPS Suppot PPP and Tun Yum Remove-y pptpd PPP Iptables--flush postrouting--table NAT Iptables--flush FORWARD Rm-rf/etc/pptpd.conf Rm-rf/etc/ppp Arch= ' Uname-m ' wget http://www.hi-vps.com/downloads/dkms-2.0.17.5-1.noarch.rpm wget http://wty.name/linux/sources/kernel_ppp_mppe-1.0.2-3dkms.noarch.rpm wget http://www.hi-vps.com/downloads/kernel_ppp_mppe-1.0.2-3dkms.noarch.rpm Wget http://www.hi-vps.com/downloads/pptpd-1.3.4-2.el6. $arch. rpm Wget http://www.hi-vps.com/downloads/ppp-2.4.5-17.0.rhel6. $arch. rpm Yum-y install make Libpcap iptables gcc-c++ logrotate tar cpio perl Pam Tcp_wrappers RPM-IVH dkms-2.0.17.5-1.noarch.rpm RPM-IVH kernel_ppp_mppe-1.0.2-3dkms.noarch.rpm Rpm-qa Kernel_ppp_mppe RPM-UVH ppp-2.4.5-17.0.rhel6. $arch. rpm Rpm-ivh pptpd-1.3.4-2.el6. $arch. rpm 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 172.16.36.1" >>/etc/pptpd.conf echo "Remoteip 172.16.36.2-254" >>/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 ["!="] Then pass=$1 Fi echo "VPN pptpd ${pass} *" >>/etc/ppp/chap-secrets Iptables-t nat-a postrouting-s 172.16.36.0/24-j SNAT--to-source ' ifconfig | grep ' inet addr: ' | Grep-v ' 127.0.0.1 ' | Cut-d:-f2 | awk ' nr==1 {print $} ' Iptables-a forward-p TCP--syn-s 172.16.36.0/24-j TCPMSS--SET-MSS 1356 Service Iptables Save Chkconfig iptables on Chkconfig pptpd on Service Iptables Start Service PPTPD Start echo "VPN service is installed, your VPN username are VPN, VPN password is ${pass}" } function Repairevpn () { echo "Begin to Repaire VPN"; MKNOD/DEV/PPP C 108 0 Service Iptables Restart Service PPTPD Start } function Addvpnuser () { echo "Input user name:" Read username echo "Input password:" Read UserPassword echo "${username} pptpd ${userpassword} *" >>/etc/ppp/chap-secrets Service Iptables Restart Service PPTPD Start } echo "Which do you want to?input the number." echo "1. Install VPN Service " echo "2. Repaire VPN Service " echo "3. Add VPN User " Read num Case "$num" in [1]) (INSTALLVPN);; [2]) (REPAIREVPN);; [3]) (addvpnuser);; *) echo "nothing,exit";; Esac

But use Windows to connect VPN when prompted 800 error, found that the firewall does not open the corresponding port, the online tutorial does not mention this, to join in the firewall

The code is as follows	Copy Code
-A rh-firewall-1-input-p tcp-m state–state new-m tcp–dport 1723-j ACCEPT

This sentence opens 1723 ports, simple to say script usage

After downloading the vpn.sh

The code is as follows	Copy Code
#wget http://www.pztai.com/vpn.sh #chmod a+x vpn.sh #./vpn.sh

Which do you want to?input the number.
1. Install VPN Service--Installation
2. Repaire VPN Service--Repair
3. Add VPN User--Add new user

The code is as follows	Copy Code
#iptables-A input-m State--state new-m tcp-p TCP--dport 1723-j ACCEPT #service iptables Save #service iptables Restart

Public places are not sure WiFi security, you can connect their own VPN, then go to the Internet.