yum install openssl openssl-devel lzo lzo-devel pam pam-devel gcc automake pkgconfig
yum install openvpn
unzip easy-rsa-master.zip
cp -R easy-rsa-master /etc/openvpn/easy-rsa
cd /etc/openvpn/easy-rsa/easyrsa3
cp vars.example vars
http://blog.csdn.net/orangleliu/article/details/43157955
http://blog.chinaunix.net/uid-20639775-id-3123671.html
http://blog.chinaunix.net/uid-20639775-id-3018478.html
http://blog.chinaunix.net/uid-20639775-id-154416.html
tar -zxvf lzo-2.09.tar.gz
cd lzo-2.09
./configure
make && make check && make install
报错1：make[1]: Leaving directory `/opt/vpn/lzo-2.09'
报错2：configure: error: ssl is required but missing
tar -zxvf openvpn-2.3.4.tar.gz
cd openvpn-2.3.4
./configure --prefix=/usr/local/openvpn --with-lzo-headers=/usr/local/include --with-lzo-lib=/usr/local/lib \
--with-ssl-headers=/usr/local/include/openssl --with-ssl-lib=/usr/local/lib
make && make install
