openvpn可工作于两种模式：
一种是IP遂道路由模式,主要应用于点对点
一种是基于以太网的遂道桥模式, 应用于点对多点,有多个分支机构
本文介绍的配置实例是第一种
拓扑图:
局域网1:
OFFICE主机装openbsd3.4 两块网卡
rl1接公网 61.131.58.x ,
rl0接 内网192.168.1.222
vpn 10.1.0.1
A client主机 192.168.1.22
局域网2:
HOME主机装redhat9.0两块网卡
rl1 接公网 218.85.158.244
rl0 接内网 192.168.0.222
vpn 10.1.0.2
B client主机 192.168.0.45
环境:openbsd3.4+lzo+openssl+openvpn
openssl用来进行加密，lzo用来进行数据压缩
下载地址 http://prdownloads.sourceforge.net/openvpn/openvpn-2.0_beta7.tar.gz
http://www.oberhumer.com/opensource/lzo/download/lzo-1.08.tar.gz
openbsd的安装就不说了
openssl在openbsd下是默认安装的
我将openvpn-2.0.beta7.tar.gz和lzo-1.08.tar.gz下载到/home
#cd /home
#tar zxvf lzo-1.08.tar.gz
#cd lzo-1.08.
#./comfigure
#make
#make install
#tar zxvf openvpn-2.0_beta7.tar.gz
#cd openvpn-2.0_beta7
#./configure --with-lzo-headers=/usr/local/include --with-lzo-lib=/usr/local/lib
#make
#make install
#mkdir /etc/openvpn
#cd /etc/openvpn
#openvpn --genkey --secret static.key
将static.key从office主机复制到home主机的/etc/openvpn目录中
office#scp static.key root@218.85.158.244:/etc/openvpn
参考/home/openvpn-2.0_beta7/sample-config-files下的文件
建立以下几个配置文件及脚本文件
office.up和openvpn-startup.sh脚本
static-office.conf配置文件
我的office主机的配置例子如下
office.up如下
#!/bin/sh
route add -net 192.168.0.0/24 10.1.0.2
openvpn-startup.sh如下
#!/bin/sh
/usr/local/sbin/openvpn --config /etc/openvpn/static-office.conf
static-office.conf如下
dev tun0remote 218.85.158.244ifconfig 10.1.0.1 10.1.0.2up ./office.upsecret /etc/openvpn/static.keyport 5000comp-lzoping 15ping 15ping-restart 45ping-timer-rempersist-tunpersist-keyverb 3
我的home主机的配置例子如下
home.up如下
#!/bin/sh
route add –net 192.168.1.0/24 10.1.0.1
openvpn-startup.sh如下
#!/bin/sh
/usr/local/sbin/openvpn --config /etc/openvpn/static-home.conf
static-home.conf如下
dev tun0remote 61.131.58.xifconfig 10.1.0.2 10.1.0.1up ./home.upsecret /etc/openvpn/static.keyport 5000comp-lzoping 15ping 15ping-restart 45ping-timer-rempersist-tunpersist-keyverb 3
在office主机及home主机两端起用pf防火墙,编辑/etc/sysctl.conf
net.inet.ip.forwarding=1
net.inet6.ip6.forwarding=1并去掉前面的#号
编辑/etc/rc.conf
pf=YES
我的office主机的pf.conf如下:
ext_if="rl1" # replace with actual external interface name i.e., dc0int_if="rl0" # replace with actual internal interface name i.e., dc1internal_net="192.168.1.0/24"priv_nets="{127.0.0.0/8,192.168.0.0/16,172.16.0.0/12,10.0.0.0/8}"set optimization aggressivescrub in allnat on $ext_if from $internal_net to any -> 61.131.58.x/32block allpass quick on lo0 allpass quick on tun0 allpass in on $int_if from any to any keep statepass out on $int_if from any to any keep stateblock drop in quick on $ext_if from $priv_nets to anyblock drop out quick on $ext_if from any to $priv_netspass out on $ext_if proto tcp all modulate state flags S/SApass out on $ext_if proto { udp,icmp } all keep state
我的home主机的pf.conf如下:
ext_if="rl1" # replace with actual external interface name i.e., dc0int_if="rl0" # replace with actual internal interface name i.e., dc1internal_net="192.168.0.0/24"priv_nets="{127.0.0.0/8,192.168.0.0/16,172.16.0.0/12,10.0.0.0/8}"set optimization aggressivescrub in allnat on $ext_if from $internal_net to any -> 218.85.158.244/32block allpass quick on lo0 allpass quick on tun0 allpass in on $int_if from any to any keep statepass out on $int_if from any to any keep stateblock drop in quick on $ext_if from $priv_nets to anyblock drop out quick on $ext_if from any to $priv_netspass out on $ext_if proto tcp all modulate state flags S/SApass out on $ext_if proto { udp,icmp } all keep state
重起office和home主机
#cd /etc/openvpn
#./openvpn-startup.sh
在局域网1 A client端 ping 局域网2 b client端
ping 192.168.0.45
大功告成
openvpn主页http://openvpn.sourceforge.net 上还有howto，faq,examples可参考
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