1、安装完centos，开启转发
# nano /etc/sysctl.conf
新增一行：net.ipv4.ip_forward = 1
生效：
# sysctl -p

2、安装oas
# yum -y install https://as-repository.openvpn.net/as-repo-centos7.rpm
# yum -y install openvpn-as
# passwd openvpn

3、crack
# yum install -y zip unzip epel-release vim curl wget net-tools
# systemctl stop openvpnas
# cd /usr/local/openvpn_as/lib/python
# mkdir unlock_license
# mv pyovpn-2.0-py3.6.egg pyovpn-2.0-py3.6.egg_bak
# cp -rp pyovpn-2.0-py3.6.egg_bak unlock_license/pyovpn-2.0-py3.6.zip
# cd unlock_license/
# unzip pyovpn-2.0-py3.6.zip
# cd pyovpn/lic/
# pip3 install uncompyle6
# uncompyle6 uprop.pyc > uprop.py
新增一行：ret['concurrent_connections'] = 2048
位置在：
        apc = self._apc()
            v_agg += apc
            if ret == None:
                ret = {}
            ret[prop] = max(v_agg + v_nonagg, bool('v_agg') + bool('v_nonagg'))
            ret['apc'] = bool(apc)
            if DEBUG:
                print("ret['%s'] = v_agg(%d) + v_nonagg(%d)" % (prop, v_agg, v_nonagg))
        ret['concurrent_connections'] = 2048
        return ret
# rm -f uprop.pyc
# python3 -O -m compileall uprop.py && mv __pycache__/uprop.cpython-36.opt-1.pyc uprop.pyc
# rm -rf __pycache__ uprop.py
# cd /usr/local/openvpn_as/lib/python/unlock_license
# zip -r pyovpn-2.0-py3.6_cracked.zip common EGG-INFO pyovpn
# mv pyovpn-2.0-py3.6_cracked.zip pyovpn-2.0-py3.6.egg
# mv pyovpn-2.0-py3.6.egg ../ && cd ..
# cd /usr/local/openvpn_as/lib/python
# rm -rf __pycache__/*
# cd /usr/local/openvpn_as/bin
# ./ovpn-init

DELETE
yes
