DNS实验作业
实验要求
1.搭建dns服务器能够对自定义的正向或者反向域完成数据解析查询。
2.配置从DNS服务器，对主dns服务器进行数据备份。
实验步骤：
1.关闭防护墙
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0
2.正向解析
[root@localhost ~]# vim /etc/named.conf
options {
listen-on port 53 { 192.168.40.128;};
directory "/var/named";
allow-query { any; };
};
zone "openlab.com" IN {
type master;
file "named.openlab.com";
};
[root@localhost ~]# vim /var/named/named.openlab.com
$TTL 1D
@ IN SOA @ wx.qq.com (
2024110100
1D
2H
5H
1D )
IN NS ns.openlab.com.
ns IN A 192.168.40.128
www IN A 192.168.75.111
wwww IN CNAME www
3.反向解析
vim /etc/named.conf
options {
listen-on port 53 { 192.168.40.128;};
directory "/var/named";
allow-query { any; };
};
zone "openlab.com" IN {
type master;
file "named.openlab.com";
};
zone "75.168.192.in-addr.arpa" IN {
type master;
file "named.192";
allow-update { none; };
};
4.配置文件
$TTL 1D
@ IN SOA @ rname.invalid. (
0 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
NS ns.openlab.com.
128 PTR ns.openlab.com.
111 PTR www.openlab.com.
5.重启服务查询结果
[root@localhost ~]# systemctl restart named
[root@localhost ~]#nslookup
6.修改DNS服务器地址
[root@localhost ~]# vim /etc/resolv.conf
# Generated by NetworkManager
search localdomain
nameserver 192.168.40.128
7.通过从服务器进行数据备份
挂载并下载安装包
[root@localhost ~]# mount /dev/sr0 /mnt
[root@localhost ~]# yum install bind -y
8.从服务器配置
[root@localhost ~]# vim /etc/named.conf
options {
listen-on port 53 { 192.168.40.129; };
directory "/var/named/slaves";
allow-query { any; };
};
zone "openlab.com" IN{
type slave;
file "named.openlab.com";
masters {192.168.40.128; };
};
zone "75.168.192.in-addr.arpa" IN{
type slave;
file "named.192";
masters {192.168.40.128; };
};
9.修改主服务器配置
[root@localhost ~]# vim /etc/named.conf
options {
listen-on port 53 { 192.168.40.128;};
directory "/var/named";
allow-query { any; };
allow-transfer{ 192.168.40.129; };
};
zone "openlab.com" IN {
type master;
file "named.openlab.com";
};
zone "75.168.192.in-addr.arpa" IN {
type master;
file "named.192";
allow-update { none; };
};
10.完全区域传输
[root@localhost ~]# watch ls -l /var/named/slaves/
[root@localhost ~]# systemctl restart named
11.修改主服务器配置
[root@localhost ~]# vim /var/named/named.openlab.com
$TTL 1D
@ IN SOA @ wx.qq.com (
2024110101
1M
1M
1M
1M )
IN NS ns.openlab.com.
IN NS slave.openlab.com.
ns IN A 192.168.40.128
slave IN A 192.168.40.129
www IN A 192.168.40.111
ftp IN A 192.168.40.100
wwww IN CNAME www
[root@localhost ~]# systemctl restart named