Build a VPN service in Centos 6.2

System Environment: This system is based on the Centos 6.2 32-bit system.

Tools: dkms-2.0.17.5-1.noarch.rpm

Kernel_ppp_mppe-1.0.2-3dkms.noarch.rpm

Pptpd-1.3.4-2.el6.i686.rpm

Ppp-2.4.5-17.0.rhel6.i686.rpm

First, download the above tool to/home/download:

# Mkdir-p/home/download

# Cd/home/download

# 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

# Wgethttp: // poptop.sourceforge.net/yum/stable/rhel6/ I #/pptpd-1.3.4-2.el6.i686.rpm

# Wgethttp: // poptop.sourceforge.net/yum/stable/rhel6/ I #/ppp-2.4.5-17.0.rhel6.i686.rpm

Continue to install the Library:

# Yum-y install make libpcap iptables gcc-c ++ logrotate tar cpio perl pam tcp_wrappers

Install the following tool:

# Rpm-ivh dkms-2.0.17.5-1.noarch.rpm

# Rpm-ivh kernel_ppp_mppe-1.0.2-3dkms.noarch.rpm

# Rpm-Uvhppp-2.4.5-17.0.rhel6.i686.rpm

# Rpm-ivhpptpd-1.3.4-2.el6.i686.rpm

Change the IP address and DNS address to the DNS address you are using...

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.ppt pd
Echo "ms-dns 8.8.4.4">/etc/ppp/options.ppt pd

Firewall Configuration:

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 $1 }''
Iptables-a forward-p tcp-syn-s 172.16.36.0/24-j TCPMSS-set-mss 1356

Service startup:

Service iptables save

Chkconfig iptables on
Chkconfig pptpd on

Service iptables start
Service pptpd start

Okay. Now, the VPN has been set up...

Create a user as follows:

# Vi/etc/ppp/chap-secrets

The edited content is (IP * indicates all ):

# Secrets for authentication using CHAP
# Client server secret IP addresses
Username pptpd password *

Restart the pptp service after configuration.

# Service pptpd start

This is the end of the tutorial .. How to configure the client. I will not write it here.