yum install nc

# nc -z -v [hostname/IP address] [port number]

# nc -z -v 192.168.10.12 22
Connection to 192.118.20.95 22 port [tcp/ssh] succeeded!

# nc -z -v 192.168.10.12 22
nc: connect to 192.118.20.95 port 22 (tcp) failed: No route to host

# nc -z -v -u [hostname/IP address] [port number]

# nc -z -v -u 192.168.10.12 123
Connection to 192.118.20.95 123 port [udp/ntp] succeeded!

opkg update && opkg install git git-http
git clone git://github.com/soimort/you-get.git
cd you-get/
./setup.py install
you-get -i "https://www.youtube.com/watch?v=OdCeoQ2dYxE&t=34s"

客户机操作系统版本 其他5.X或更高linux64，可以选vmxnet3，获取更好的性能。
esxi 7 安装，启动的时候要输入参数，避免占用120空间
ikuai主路由 lede等做旁路由，会出现mac地址混乱的问题，要在主路由开通xx，旁路由启动yyy
安装windows 10，可能安装过程认不出网卡，先取消联网，装了vmtools之后就行了
esxi的管理口可以在启动后的黄黑屏幕设置，可以多选，选了以后就不能直通了
管理口设置的ip地址放一个网段，允许混杂，可以不插网线访问
esxi上的系统可以通过这个管理口虚拟的网卡做连通
如果用主路由+胖路由的方式上网，群晖设置外网访问upnp，说有两个路由器，把网关手工指定一下就行了

systemctl使用
systemctl unmask firewalld #执行命令，即可实现取消服务的锁定
systemctl mask firewalld # 下次需要锁定该服务时执行
systemctl start firewalld.service #启动防火墙
systemctl stop firewalld.service #停止防火墙
systemctl reloadt firewalld.service #重载配置
systemctl restart firewalld.service #重启服务
systemctl status firewalld.service #显示服务的状态
systemctl enable firewalld.service #在开机时启用服务
systemctl disable firewalld.service #在开机时禁用服务
systemctl is-enabled firewalld.service #查看服务是否开机启动
systemctl list-unit-files|grep enabled #查看已启动的服务列表
systemctl –failed #查看启动失败的服务列表

firewall-cmd使用
firewall-cmd –state #查看防火墙状态
firewall-cmd –reload #更新防火墙规则
firewall-cmd –state #查看防火墙状态
firewall-cmd –reload #重载防火墙规则
firewall-cmd –list-ports #查看所有打开的端口
firewall-cmd –list-services #查看所有允许的服务
firewall-cmd –get-services #获取所有支持的服务

/usr/lib/firewalld/services

#区域相关
firewall-cmd –list-all-zones #查看所有区域信息
firewall-cmd –get-active-zones #查看活动区域信息
firewall-cmd –set-default-zone=public #设置public为默认区域
firewall-cmd –get-default-zone #查看默认区域信息
firewall-cmd –zone=public –add-interface=eth0 #将接口eth0加入区域public
#接口相关
firewall-cmd –zone=public –remove-interface=eth0 #从区域public中删除接口eth0
firewall-cmd –zone=default –change-interface=eth0 #修改接口eth0所属区域为default
firewall-cmd –get-zone-of-interface=eth0 #查看接口eth0所属区域

用例
firewall-cmd –query-port=8080/tcp # 查询端口是否开放

firewall-cmd –add-port=80/tcp –permanent #永久添加80端口例外(全局)
firewall-cmd –remove-port=80/tcp –permanent #永久删除80端口例外(全局)
firewall-cmd –add-port=65001-65010/tcp –permanent #永久增加65001-65010例外(全局)
firewall-cmd –zone=public –add-port=80/tcp –permanent #永久添加80端口例外(区域public)
firewall-cmd –zone=public –remove-port=80/tcp –permanent #永久删除80端口例外(区域public)
firewall-cmd –zone=public –add-port=65001-65010/tcp –permanent #永久增加65001-65010例外(区域public)

firewall-cmd –reload #重启防火墙(修改配置后要重启防火墙)

打开命令行(管理员权限)，输入
netsh winsock reset
重启电脑即可

参照这个文章的配置，

https://www.ecsoe.com/archives/38.html

一次成功

先安装了nginx+ssl，再安装v2ray，调整配置。

yum -y update
bash <(curl -L -s https://install.direct/go.sh)
systemctl enable v2ray
vi /etc/nginx/conf.d/v2ray.conf

server {
    listen       443 ssl;
    server_name  example.com;

    ssl_certificate    /etc/letsencrypt/live/example.com/fullchain.pem;
    ssl_certificate_key    /etc/letsencrypt/live/example.com/privkey.pem;
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:HIGH:!aNULL:!MD5:!RC4:!DHE;
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    error_page 497  https://$host$request_uri;

location /ray {
    proxy_pass       http://127.0.0.1:10000;
    proxy_redirect             off;
    proxy_http_version         1.1;
    proxy_set_header Upgrade   $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header Host      $http_host;
    }
}


{
  "inbounds": [
    {
      "port": 10000,
      "listen":"127.0.0.1",
      "protocol": "vmess",
      "settings": {
        "clients": [
          {
            "id": "你的UUID",
            "alterId": 64
          }
        ]
      },
      "streamSettings": {
        "network": "ws",
        "wsSettings": {
        "path": "/ray"
        }
      }
    }
  ],
  "outbounds": [
    {
      "protocol": "freedom",
      "settings": {}
    }
  ]
}


vi /etc/selinux/config
SELINUX=disabled
setenforce 0