DNS configuration under Linux

Course Title		Server configuration and management					experiment score
Experiment name		DNS server configuration
student ID			Name		class		date
Purpose: 1. Master the basic commands of the linux system 2 Master the principle of DNS 3. Master the installation and configuration method of liunx enterprise version DNS server and client
experiment platform:   cloud platform
1. Experiment content Configure the DNS server and client to complete DNS resolution. 2. Server-side settings 1. Configure the network card, and configure the DNS server address in the network card. 2. View on the server and install the bind server software package.  [root@localhost ~]# rpm -qa|grep bind bind-libs-9.9.4-29.el7.x86_64 bind -9.9.4-29.el7.x86_64 3. Modify the /etc/named.conf configuration file and add the forward zone "sh.com". The result is as follows:      4. Exit the vi editor and use the named-checkconf command to check the configuration file [root@localhost Packages]# named-checkconf  /etc/named.conf    5. Configure the sh.com.hosts forward parsing file, you can copy the template to modify. [root@localhost ~]#cp  /var/named/named.localhost  /var/named/sh.com.hosts [root@localhost ~]# vi  /var/named/sh.com.hosts   7. Use named-checkzone to check the forward direction and whether the zone configuration is wrong [root@localhost ~]# named-checkzone sh.com /var/named/sh.com.hosts appear zone sh.com/IN: loaded serial 0 OK 显示为OK则配置没有问题   8、启动服务 [root@localhost ~]# systemctl start named.service [root@localhost ~]# systemctl status named.service 二、客户端设置 使用host命令检查是否能够解析，如果解析成功，如图所示。   三、需要注意的问题：   1、不能启动named程序，出现错误 [root@localhost ~]# systemctl start named.service Job for smb.service failed because the control process exited with error code. See "systemctl status named.service" and "journalctl -xe" for details.   解决办法：1、使用testparm检查配置文件， 1、        查看第二行有没有多一个@. 2、        下面解析所有行都顶格 3、        域名后面要有个”.”    2、如果host 命令出错    (1)关闭防火墙： #systemctl stop firewalld.                  (2)修改正向和反向区域文件权限。 Chmod –R  757 /var/named/sh.com.hosts          (3)重启DNS服务
实验总结（结论或问题分析）：       DNS与IP一致