dnslinux搭建服务

我在centos7系统中搭建DNS服务，在更改完防火墙设置和selinux设置后，重启iptables总是失败。然后iptables服务里的详细是这个图。。。。想问问各位大神，怎么解决

如何在linux局域网内搭建一个dns服务，将主机名解析为ip？公司内网测试主机较多，不想每增加一台机器，就更改所有主机的/etc/hosts文件。网上找到的搭建dns服务，都是将域名转换为ip，有没有简单的配置，可以直接将主机名转化为ip。

linux中搭建DNS服务

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云解析DNS

云解析 DNS（Domain Name System，简称DNS）为企业和开发者将易于管理识别的域名转换为计算机用于互连通信的数字IP地址，从而将用户的访问路由到相应的网站或应用服务器。

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