DNS正向解析与反向解析实验

正向解析

1. 安装bind软件

[root@localhost ~]# dnf install bind bind-utils -y

2. 修改主配置文件/etc/named.conf

[root@localhost ~]# vim /etc/named.conf

3. 重启DNS服务（named）

[root@localhost ~]# systemctl restart named

4. 编辑数据配置文件。在/var/named目录下

[root@localhost ~]# cd /var/named/
[root@localhost named]# vim named.haha

5. 重启named服务

[root@localhost named]# systemctl restart named

6. 测试
   
   

反向解析

1. 修改主配置文件

[root@localhost named]# vim /etc/named.conf 

2. 编辑数据文件

[root@localhost named]# vim /var/named/fanxiang 

3. 重启named服务

[root@localhost named]# systemctl restart named

4. 测试

[root@localhost named]# dig -x A www.haha.com

; <<>> DiG 9.16.23-RH <<>> -x A www.haha.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 32215
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 7dc28dc4d6837c6601000000668942625655cf5e92891c05 (good)
;; QUESTION SECTION:
;A.in-addr.arpa.			IN	PTR

;; AUTHORITY SECTION:
in-addr.arpa.		3600	IN	SOA	b.in-addr-servers.arpa. nstld.iana.org. 2022094448 1800 900 604800 3600

;; Query time: 862 msec
;; SERVER: 192.168.209.136#53(192.168.209.136)
;; WHEN: Sat Jul 06 21:10:58 CST 2024
;; MSG SIZE  rcvd: 143

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20119
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 7dc28dc4d6837c6601000000668942625655cf5e92891c05 (good)
;; QUESTION SECTION:
;www.haha.com.			IN	A

;; ANSWER SECTION:
www.haha.com.		86400	IN	A	192.168.209.140

;; Query time: 1 msec
;; SERVER: 192.168.209.136#53(192.168.209.136)
;; WHEN: Sat Jul 06 21:10:58 CST 2024
;; MSG SIZE  rcvd: 85

[root@localhost named]# dig -x A 192.168.209.136

; <<>> DiG 9.16.23-RH <<>> -x A 192.168.209.136
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 46539
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 7baf9331949152f2010000006689428e6f53054233542489 (good)
;; QUESTION SECTION:
;A.in-addr.arpa.			IN	PTR

;; AUTHORITY SECTION:
in-addr.arpa.		3556	IN	SOA	b.in-addr-servers.arpa. nstld.iana.org. 2022094448 1800 900 604800 3600

;; Query time: 1 msec
;; SERVER: 192.168.209.136#53(192.168.209.136)
;; WHEN: Sat Jul 06 21:11:42 CST 2024
;; MSG SIZE  rcvd: 143

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 8491
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 7baf9331949152f2010000006689429498a1106a679dcba1 (good)
;; QUESTION SECTION:
;192.168.209.136.		IN	A

;; AUTHORITY SECTION:
.			10800	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2024070600 1800 900 604800 86400

;; Query time: 988 msec
;; SERVER: 192.168.209.136#53(192.168.209.136)
;; WHEN: Sat Jul 06 21:11:48 CST 2024
;; MSG SIZE  rcvd: 147