Cenos7搭建OpenVPN

port 1194   # 监听的端口号
proto udp   # 服务端用的协议，udp 能快点，所以我选择 udp
dev tun
ca /etc/openvpn/server/certs/ca.crt  #   CA 根证书路径
cert /etc/openvpn/server/certs/server.crt  # open VPN 服务器证书路径
key /etc/openvpn/server/certs/server.key  # open VPN 服务器密钥路径，This file should be kept secret
dh /etc/openvpn/server/certs/dh.pem  # Diffie-Hellman 算法密钥文件路径
tls-auth /etc/openvpn/server/certs/ta.key 0 #  tls-auth key，参数 0 可以省略，如果不省略，那么客户端
# 配置相应的参数该配成 1。如果省略，那么客户端不需要 tls-auth 配置
server 10.8.0.0 255.255.255.0   # 该网段为 open VPN 虚拟网卡网段，不要和内网网段冲突即可。open VPN 默认为 10.8.0.0/24
push "dhcp-option DNS 8.8.8.8"  # DNS 服务器配置，可以根据需要指定其他 ns
push "dhcp-option DNS 8.8.4.4"
push "redirect-gateway def1"   # 客户端所有流量都通过 open VPN 转发，类似于代理开全局
compress lzo
duplicate-cn   # 允许一个用户多个终端连接
keepalive 10 120
comp-lzo
persist-key
persist-tun
user openvpn  # open VPN 进程启动用户，openvpn 用户在安装完 openvpn 后就自动生成了
group openvpn
log /var/log/openvpn/server.log  # 指定 log 文件位置
log-append /var/log/openvpn/server.log
status /var/log/openvpn/status.log
verb 3
explicit-exit-notify 1

client
proto udp
dev tun
remote [open VPN服务端公网 ip，根据实际情况填写] 1194
ca ca.crt
cert server.crt
key server.key
tls-auth ta.key 1
remote-cert-tls server
persist-tun
persist-key
comp-lzo
verb 3
mute-replay-warnings

# ! /bin/bash

set -e

OVPN_USER_KEYS_DIR=/etc/openvpn/client/keys
EASY_RSA_VERSION=3
EASY_RSA_DIR=/etc/openvpn/easy-rsa/
PKI_DIR=$EASY_RSA_DIR/$EASY_RSA_VERSION/pki

for user in "$@"
do
  if [ -d "$OVPN_USER_KEYS_DIR/$user" ]; then
    rm -rf $OVPN_USER_KEYS_DIR/$user
    rm -rf  $PKI_DIR/reqs/$user.req
    sed -i '/'"$user"'/d' $PKI_DIR/index.txt
  fi
  cd $EASY_RSA_DIR/$EASY_RSA_VERSION
  # 生成客户端 ssl 证书文件
  ./easyrsa build-client-full $user nopass
  # 整理下生成的文件
  mkdir -p  $OVPN_USER_KEYS_DIR/$user
  cp $PKI_DIR/ca.crt $OVPN_USER_KEYS_DIR/$user/   # CA 根证书
  cp $PKI_DIR/issued/$user.crt $OVPN_USER_KEYS_DIR/$user/   # 客户端证书
  cp $PKI_DIR/private/$user.key $OVPN_USER_KEYS_DIR/$user/  # 客户端证书密钥
  cp /etc/openvpn/client/sample.ovpn $OVPN_USER_KEYS_DIR/$user/$user.ovpn # 客户端配置文件
  sed -i 's/admin/'"$user"'/g' $OVPN_USER_KEYS_DIR/$user/$user.ovpn
  cp /etc/openvpn/server/certs/ta.key $OVPN_USER_KEYS_DIR/$user/ta.key  # auth-tls 文件
  cd $OVPN_USER_KEYS_DIR
  zip -r $user.zip $user
done
exit 0

# ! /bin/bash

set -e
OVPN_USER_KEYS_DIR=/etc/openvpn/client/keys
EASY_RSA_VERSION=3
EASY_RSA_DIR=/etc/openvpn/easy-rsa/
for user in "$@"
do
  cd $EASY_RSA_DIR/$EASY_RSA_VERSION
  echo -e 'yes\n' | ./easyrsa revoke $user
  ./easyrsa gen-crl
  # 吊销掉证书后清理客户端相关文件
  if [ -d "$OVPN_USER_KEYS_DIR/$user" ]; then
    rm -rf $OVPN_USER_KEYS_DIR/${user}*
  fi
  systemctl restart openvpn@server
done
exit 0