Debian之OpenVPN配置

1. OpenVPN安装

  Debian安装OpenVPN server: apt-get install openvpn

  配置脚本默认安装在/usr/share/doc/openvpn/examples/easy-rsa/2.0下

  配置文件默认放在/etc/openvpn

  MaxOSX安装OpenVPN客户端: tunnelblick

2. Server配置

  ./build-ca

  ./build-key-server server

  ./build-key client

  ./build-dh

  Server需要ca.crt, server.key, server.crt, dh1024.pem

  Server配置文件默认在/usr/share/doc/openvpn/examples/sample-config-files/server.conf

  

port 1194
proto udp
dev tun
ca /etc/openvpn/ca.crt
cert /etc/openvpn/server.crt
key /etc/openvpn/server.key
dh /etc/openvpn/dh1024.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "redirect-gateway def1 bypass-dhcp"
push "dhcp-option DNS 202.107.105.13"
push "dhcp-option DNS 202.108.107.21"
keepalive 10 120
comp-lzo
user nobody
group nogroup
persist-key
persist-tun
status openvpn-status.log
verb 3


启动OpenVPN server: /etc/init.d/openvpn start

配置IP转发: echo 1 > /proc/sys/net/ipv4/ip_forward
修改/etc/sysctl.conf: 取消注释net.ipv4.ip_forward = 1

配置iptables规则:
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE
iptables -t nat -L查看规则配置是否成功

3. Client配置

client
dev tun
proto udp
remote 66.32.272.181 1194
resolv-retry infinite
nobind
user nobody
group nogroup
persist-key
persist-tun
mute-replay-warnings
ca /etc/openvpn/ca.crt
cert /etc/openvpn/client_kevin.crt
key /etc/openvpn/client_kevin.key
ns-cert-type server
comp-lzo
verb 3
up /etc/openvpn/update-resolv-conf
down /etc/openvpn/update-resolv-conf