Openvpn-client

vpn-client#ifconfig eth0 192.168.30.1/24
vpn-client#route add default gw 192.168.30.254

Router

routing#ifconfig eth0 192.168.30.254/24
routing#ifconfig eth1 192.168.50.254/24
routing#vim /etc/sysctl.conf

～略～
net.ipv4.ip_forward = 1
～略～

Openvpn-server

vpnServer#ifconfig eth0 192.168.50.1/24
vpnServer#ifconfig eth1 192.168.200.254/24
vpnServer#vim /etc/sysctl.conf

~略~
net.ipv4.ip_forward = 1
～略～

vpnServer# route add -net 192.168.30.0 netmask 255.255.255.0 gw 192.168.50.254

WEBTest

web#ifconfig eth0 192.168.200.1/24
web#route add default gw 192.168.200.254

測試Openvpn-client與Openvpn-server是否可以互ping,若通的話,此階段就完成

vpn-client#ping 192.168.50.1

vpnServer#ping 192.168.30.1

分別在Openvpn-client and Openvpn-server安裝epel-release

#rpm -ivh  http://mirror01.idc.hinet.net/EPEL/6/i386/epel-release-6-7.noarch.rpm

分別在Openvpn-client and Openvpn-server安裝OpenVPN

#yum install openvpn

在openvpn-server裡建立靜態金鑰

#cd /etc/openvpn/keys
#openvpn --genkey --secret static.key 

複製static.key到openvpn-client

#scp static.key 192.168.30.1:/etc/openvpn/keys

Openvpn-server

vpnServer#vim /etc/openvpn/server1.conf

dev tun
proto udp
ifconfig 10.0.0.1 10.0.0.2
secret /etc/openvpn/keys/static.key
local 192.168.50.1
keepalive 10 60
comp-lzo
daemon

vpnServer# iptables -I INPUT -p udp --dport 1194 -j ACCEPT

vpnServer# iptables -I INPUT -i tun+ -j ACCEPT

vpnServer# iptables -I FORWARD -i tun+ -j ACCEPT

Openvpn-client

vpn-client# vim /etc/openvpn/client1.conf

remote 192.168.50.1
dev tun
ifconfig 10.0.0.2 10.0.0.1
route 192.168.200.0 255.255.255.0
secret /etc/openvpn/keys/static.key
keepalive 10 60
comp-lzo

啟動OpenVPN

vpnServer# openvpn /etc/openvpn/server1.conf

vpn-client#openvpn /etc/openvpn/client1.conf