第九周作业

1、配置 bind 服务，实现 www.magedu.org 域名解析

配置环境

# 主DNS服务器：10.0.0.8
# www.magedu.org：10.0.0.9

修改主配置文件/etc/named.conf

[root@centos8 scripts]#vim /etc/named.conf
#注释如下两行
//      listen-on port 53 { 127.0.0.1; };
//      allow-query     { localhost; };

在配置文件/etc/named.rfc1912.zones中定义区域

zone "magedu.org" IN {
        type master;
        file "magedu.org.zone";
};

编写区域解析库文件

[root@centos8 named]#vim magedu.org.zone
$TTL 86400
@       IN  SOA  master admin ( 01 1H 10M 1D 1H )
        IN   NS  master
master  IN    A  10.0.0.8
www     IN    A  10.0.0.9

解析测试

[root@centos8 named]#host www.magedu.org 10.0.0.8
Using domain server:
Name: 10.0.0.8
Address: 10.0.0.8#53
Aliases:

www.magedu.org has address 10.0.0.9

2、配置 bind 服务，实现域名反向解析

在配置文件/etc/named.rfc1912.zones中定义反向区域

[root@centos8 named]#vim /etc/named.rfc1912.zones

zone "0.0.10.in-addr.arpa" IN {
        type master;
        file "10.0.0.zone";
};

定义反向解析库文件

[root@centos8 named]#vim /var/named/10.0.0.zone
$TTL 86400
@       IN  SOA  master.magedu.org.  admin.magedu.org.  ( 01 1H 10M 1D 1H )
        IN   NS  master.magedu.org.
8       IN  PTR  master.magedu.org.
9       IN  PTR  www.magedu.org.

测试

[root@centos8 named]#rndc reload
server reload successful

[root@centos8 named]#named-checkconf
[root@centos8 named]#named-checkzone 0.0.10.in-addr.arpa /var/named/10.0.0.zone
zone 0.0.10.in-addr.arpa/IN: loaded serial 1
OK

[root@centos8 named]#host -t PTR 10.0.0.9 10.0.0.8
Using domain server:
Name: 10.0.0.8
Address: 10.0.0.8#53
Aliases:

9.0.0.10.in-addr.arpa domain name pointer www.magedu.org.

3、配置 bind 服务，实现主从 DNS 服务配置：

环境配置

#主DNS服务器：10.0.0.8
#从DNS服务器：10.0.0.18
# www.magedu.org：10.0.0.9
#客户机：10.0.0.6

修改从DNS服务器的主配置文件/etc/named.conf

[root@centos8 scripts]#vim /etc/named.conf
#注释如下两行
//      listen-on port 53 { 127.0.0.1; };
//      allow-query     { localhost; };

在从DNS服务器（10.0.0.18）上设置区域配置文件

[root@centos8 script]#vim /etc/named.rfc1912.zones

zone "magedu.org" IN {
        type slave;
        file "slaves/magedu.org.zone";
        masters { 10.0.0.8; };
};

zone "0.0.10.in-addr.arpa" IN {
        type slave;
        file "slaves/10.0.0.zone";
        masters { 10.0.0.8; };
};

修改主DNS服务器（10.0.0.8）区域解析库文件


[root@centos8 named]#vim /var/named/magedu.org.zone
$TTL 86400
@       IN  SOA  master admin ( 02 1H 10M 1D 1H )
        IN   NS  master
        IN   NS  slave
master  IN    A  10.0.0.8
slave   IN    A  10.0.0.18
www     IN    A  10.0.0.9

#反向区域
[root@centos8 named]#vim /var/named/10.0.0.zone
$TTL 86400
@       IN  SOA  master.magedu.org.  admin.magedu.org.  ( 02 1H 10M 1D 1H )
        IN   NS  master.magedu.org.
        IN   NS  slave.magedu.org.
8       IN  PTR  master.magedu.org.
18      IN  PTR  slave.magedu.org.
9       IN  PTR  www.magedu.org.

主从DNS服务器都重新读取配置文件：rndc reload，并使用客户机（10.0.0.6）测试

#正向测试
[root@localhost ~]# host www.magedu.org 10.0.0.18
Using domain server:
Name: 10.0.0.18
Address: 10.0.0.18#53
Aliases:

www.magedu.org has address 10.0.0.9

#反向测试
[root@localhost ~]# host -t PTR 10.0.0.9 10.0.0.18
Using domain server:
Name: 10.0.0.18
Address: 10.0.0.18#53
Aliases:

9.0.0.10.in-addr.arpa domain name pointer www.magedu.org.

4、配置 bind 服务，实现子域服务器

环境配置

#子域为：ops.magedu.org
#子域DNS服务器：10.0.0.28
#www.ops.magedu.org：10.0.0.10

#父域主DNS服务器：10.0.0.8
#父域从DNS服务器：10.0.0.18
#www.magedu.org：10.0.0.9

修改子域DNS服务器（10.0.0.28）的主配置文件

[root@centos8 scripts]#vim /etc/named.conf
#注释如下两行
//      listen-on port 53 { 127.0.0.1; };
//      allow-query     { localhost; };

在子域DNS服务器的配置文件/etc/named.rfc1912.zone增加子域配置

[root@centos8 script]#vim /etc/named.rfc1912.zones

zone "ops.magedu.org" IN {
        type master;
        file "ops.magedu.org.zone";
};

在子域DNS服务器中增加解析库文件

[root@centos8 script]#vim /var/named/ops.magedu.org.zone
$TTL 86400
@       IN  SOA  subns1  admin  ( 01 1H 10M 1D 1H )
        IN   NS  subns1
subns1  IN    A  10.0.0.28
www     IN    A  10.0.0.10

#启动子域DNS服务

[root@centos8 script]#systemctl start named

在父域DNS服务器中授权子域

[root@centos8 named]#vim /var/named/magedu.org.zone
$TTL 86400
@               IN  SOA  master admin ( 03 1H 10M 1D 1H )
                IN   NS  master
                IN   NS  slave
master          IN    A  10.0.0.8
slave           IN    A  10.0.0.18
www             IN    A  10.0.0.9

ops             IN   NS  subns1.ops
subns1.ops      IN    A  10.0.0.28
~

测试：使用父域DNS服务器来解析子域主机

[root@localhost ~]# host -t NS ops.magedu.org 10.0.0.8
Using domain server:
Name: 10.0.0.8
Address: 10.0.0.8#53
Aliases:

ops.magedu.org name server subns1.ops.magedu.org.
[root@localhost ~]# host subns1.ops.magedu.org 10.0.0.8
Using domain server:
Name: 10.0.0.8
Address: 10.0.0.8#53
Aliases:

subns1.ops.magedu.org has address 10.0.0.28
[root@localhost ~]# host www.ops.magedu.org 10.0.0.8
Using domain server:
Name: 10.0.0.8
Address: 10.0.0.8#53
Aliases:

www.ops.magedu.org has address 10.0.0.10

实现子域解析父域：修改子域dns服务器（10.0.0.28）的配置文件：/etc/named.rfc1912.zones

[root@centos8 script]#vim /etc/named.rfc1912.zones

zone "magedu.org" IN {
        type forward;
        forward only;
        forwarders { 10.0.0.8; };
};

测试：使用子域DNS服务器解析www.magedu.org

[root@centos8 script]#rndc reload
server reload successful
[root@centos8 script]#
[root@centos8 script]#host www.magedu.org 10.0.0.28
Using domain server:
Name: 10.0.0.28
Address: 10.0.0.28#53
Aliases:

www.magedu.org has address 10.0.0.9