RHCE Course Summary

dns server:
Requirements:
Configure the dns master-slave server to resolve all hosts under the qq.com domain, www.qq.com aaa.qq.com bbb.qq.com …

1. Mount and install

2. Configuration file
Change configuration custom resolution domain (qq.com)
[[email protected] ~]# vim /etc/named.conf

Close the firewall, selinux:
[[email protected] ~]# systemctl stop firewalld
[[email protected] ~]# setenforce 0

Change configuration to:

2. Resource record file configuration

[[email protected] ~]# vim /var/named/named.qq.com

Restart service:
[[email protected] ~]# systemctl restart named

Tested with client host:
Passed command line test - failed due to no cache

Modify the dns of the local host:
Enter the information to record the current local dns configuration and modify:
[[email protected] ~]# vim /etc/resolv.conf
Note: Temporary effective;

Modify nameserver to server host:

Test:

Because 127,111,100 are hypothetical ips, it doesn't work.

The experiment was successful