小心DNS服务泄露了你的内网基础设施

复制michael@seventysix:~ ping internal-db1.example.com PING internal-db1.example.com (10.0.0.1) 56(84) bytes of data. ^C --- internal-db1.example.com ping statistics --- 3 packets transmitted,小心 0 received, 100% packet loss, time 2014ms 1.2.3.4.5.