openvpn又可以翻墙了

时间：2017-08-09 来源：翻墙论坛作者：[email protected] 条评论

今天安装后，发现又可用openvpn翻墙了。

安装方法如下：
登录linux vps.
wget https://github.com/Nyr/openvpn-install/raw/master/openvpn-install.sh
bash openvpn-install.sh

运行此条bash openvpn-install.sh，最后显示：
...
Generating a 2048 bit RSA private key
................+++
.............................+++
writing new private key to '/etc/openvpn/easy-rsa/pki/private/server.key.bMvlQu5Gie'
-----
Using configuration from /etc/openvpn/easy-rsa/openssl-1.0.cnf
Check that the request matches the signature
Signature ok
The Subject's Distinguished Name is as follows
commonName            :PRINTABLE:'server'
Certificate is to be certified until Jul 2 04:22:38 2027 GMT (3650 days)

Write out database with 1 new entries
Data Base Updated
Generating a 2048 bit RSA private key
...........+++
..........................................+++
writing new private key to '/etc/openvpn/easy-rsa/pki/private/client2.key.7nwUyrULSK'
-----
Using configuration from /etc/openvpn/easy-rsa/openssl-1.0.cnf
Check that the request matches the signature
Signature ok
The Subject's Distinguished Name is as follows
commonName            :PRINTABLE:'client2'
Certificate is to be certified until Jul 2 04:22:39 2027 GMT (3650 days)

Write out database with 1 new entries
Data Base Updated
Using configuration from /etc/openvpn/easy-rsa/openssl-1.0.cnf

An updated CRL has been created.
CRL file: /etc/openvpn/easy-rsa/pki/crl.pem

* Stopping virtual private network daemon(s)...                                 *   No VPN is running.
* Starting virtual private network daemon(s)...                                 *   Autostarting VPN 'server'
Finished!

Your client configuration is available at /root/client2.ovpn
If you want to add more clients, you simply need to run this script again!
root@localhost:~#
root@localhost:~# ps aux|grep openvpn
nobody    7875 0.0 0.1 28492 1048 ?        Ss   05:22   0:00 /usr/sbin/openvpn --writepid /run/openvpn/server.pid --daemon ovpn-server --cd /etc/openvpn --config /etc/openvpn/server.conf --script-security 2
root      7926 0.0 0.0 11740   904 pts/6    S+   05:27   0:00 grep openvpn
root@localhost:~#

服务器端的配置文件内容如下：
root@localhost:~# cat /etc/openvpn/server.conf
port 1278
proto udp
dev tun
sndbuf 0
rcvbuf 0
ca ca.crt
cert server.crt
key server.key
dh dh.pem
auth SHA512
tls-auth ta.key 0
topology subnet
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "redirect-gateway def1 bypass-dhcp"
push "dhcp-option DNS 8.8.8.8"
push "dhcp-option DNS 8.8.4.4"
keepalive 10 120
cipher AES-256-CBC
comp-lzo
user nobody
group nogroup
persist-key
persist-tun
status openvpn-status.log
verb 3
crl-verify crl.pem
root@localhost:~#

下载的客户端的配置文件client2.ovpn的内容：

client
dev tun
proto udp
sndbuf 0
rcvbuf 0
remote my-vps-ip 1278
resolv-retry infinite
nobind
persist-key
persist-tun
remote-cert-tls server
auth SHA512
cipher AES-256-CBC
comp-lzo
setenv opt block-outside-dns
key-direction 1
verb 3

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可见2边的配置文件里都有cipher AES-256-CBC 这行代码，而众所周知AES-256-CBC 是用来加密的，就像shadowsocks的4个参数之一：加密方式，我们常用的是aes-256-cfb.估计就是Qeb免费翻墙网
cipher AES-256-CBC这行代码给openvpn的链接加了一道密：加密连接，从而使得gfw无法侦测openvpn的流量特征，无法封锁openvpn,于是又可用openvpn翻墙了。Qeb免费翻墙网
Qeb免费翻墙网
注：proto的值建议选择udp, udp协议比tcp协议更抗干扰。vps类型则建议选择openvz之外的类型，比如kvm/xen.如果你一定要用openvz vps,建议你使用bandwagonhost.com提供的openvz vps，这家的openvz vps默认开启了tun/tap。如果使用其他vps供应商(比如alpharacks.com)的openvz vps,最好发ticket给其客服，要求enable tun/tap.(在其vps control panel里，用户自行enable tun/tap的话，其实并未真正的生效),然后运行：Qeb免费翻墙网
openvpn --writepid /run/openvpn/server.pid --daemon ovpn-server --cd /etc/openvpn --config /etc/openvpn/server.conf --script-security 2 Qeb免费翻墙网
然后设置OpenVPN访问外网：Qeb免费翻墙网
echo 1 > /proc/sys/net/ipv4/ip_forwardQeb免费翻墙网
（或者：sysctl -w net.ipv4.ip_forward=1）Qeb免费翻墙网
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o venet0 -j MASQUERADE （注意：如果你的vps是xen／kvm平台，则需把venet0改为eth0) Qeb免费翻墙网
至此，服务器端设置完毕。Qeb免费翻墙网
Qeb免费翻墙网
如果你的本地机器是mac,请下载／安装mac上面的openvpn客户端程序tunnelblick.然后在mac的finder里面，进入“下载”文件夹，双击下载到“下载”文件夹中的客户端配置文件（.ovpn文件），即可导入该配置文件到tunnelblick，然后就可用tunnelblick翻墙了。Qeb免费翻墙网
Qeb免费翻墙网
相关帖子：http://briteming.blogspot.com/2016/08/openvpn.htmlQeb免费翻墙网
Qeb免费翻墙网
本帖即是用此法翻墙后发布的。Qeb免费翻墙网
Qeb免费翻墙网
如果你使用一段时间翻不了墙了，重启客户端即可。如果还是不行，请重启系统，再运行客户端。Qeb免费翻墙网
Qeb免费翻墙网
注：最好设置本地操作系统的dns为8.8.8.8，否则即使连上了openvpn server,也还是翻墙失败。mac下的设置方法见此：Qeb免费翻墙网
http://briteming.blogspot.com/2017/06/blog-post_87.html Qeb免费翻墙网
Qeb免费翻墙网
如果你的mac系统翻墙一段时间后，你发现翻墙越来越慢，估计是mac系统的dns又变回了isp的dns, 此时请按此文Qeb免费翻墙网
http://briteming.blogspot.com/2017/06/blog-post_87.html ，Qeb免费翻墙网
设置本地操作系统的dns为8.8.8.8，翻墙速度就会立刻变得飞快。Qeb免费翻墙网
Qeb免费翻墙网
from http://briteming.blogspot.com/2017/07/openvpnopenvpn-installopenvpnopenvpn.htmlQeb免费翻墙网
Qeb免费翻墙网

使用10来天后，觉得在openvz vps上搭建的openvpn不易连上，因此强烈建议在kvm vps/xen vps上搭建openvpn!!!Qeb免费翻墙网

在ios device上，切换app store到香港区，搜索openvpn connect,进行安装。（在Qeb免费翻墙网
app store的中国区，openvpn connect已经下架）Qeb免费翻墙网
然后把下载的客户端的配置文件client2.Qeb免费翻墙网

ovpn作为附件发到自己的邮箱，登录邮箱，点击附件client2.ovpn，会显示‘在openvpn中打开‘的链接，点击该链接，再点击弹出的页面中的“+”号，即可把客户端的配置文件client2.ovpn导入到客户端程序openvpn connect中，然后在openvpn connect中启用连接，稍等片刻，ios device的右上角就会出现VPN字样，ios device即可翻墙

来自https://groups.google.com/forum/#!topic/fqlt/GUn-QNO1ZpU