yum install bind bind-utils -y

vim /etc/named.conf 

options {

	listen-on port 53 { any; }; #监听任何ip对53端口的请求

	listen-on-v6 port 53 { ::1; };

	directory 	"/var/named";

	dump-file 	"/var/named/data/cache_dump.db";

	statistics-file "/var/named/data/named_stats.txt";

	memstatistics-file "/var/named/data/named_mem_stats.txt";

	recursing-file  "/var/named/data/named.recursing";

	secroots-file   "/var/named/data/named.secroots";

	allow-query     { any; };  #接收任何来源查询dns记录

	/*

	 - If you are building an AUTHORITATIVE DNS server, do NOT enable recursion.

	 - If you are building a RECURSIVE (caching) DNS server, you need to enable

	   recursion.

	 - If your recursive DNS server has a public IP address, you MUST enable access

	   control to limit queries to your legitimate users. Failing to do so will

	   cause your server to become part of large scale DNS amplification

	   attacks. Implementing BCP38 within your network would greatly

	   reduce such attack surface

	*/

	recursion yes;

	dnssec-enable yes;

	dnssec-validation yes;

	/* Path to ISC DLV key */

	bindkeys-file "/etc/named.iscdlv.key";

	managed-keys-directory "/var/named/dynamic";

	pid-file "/run/named/named.pid";

	session-keyfile "/run/named/session.key";

};

logging {

        channel default_debug {

                file "data/named.run";

                severity dynamic;

        };

};

zone "." IN {

	type hint;

	file "named.ca";

};

#增加一个a.com域名的解析，具体解析规则在/var/named/a.com.zone里

zone "a.com" IN {

    type master;

    file "a.com.zone";

};

#增加一个反向解析，即根据ip查域名（不需要的话可以不设置）

zone "56.17.172.in-addr.arpa" IN {

    type master;

    file "172.17.56.zone";

};

include "/etc/named.rfc1912.zones";

include "/etc/named.root.key";

[root@izj6c1w3z30pendgik4p4vz ~]# cat /var/named/a.com.zone

$TTL 1D

@	IN SOA	@ root.a.com. (

					0	; serial

					1D	; refresh

					1H	; retry

					1W	; expire

					3H )	; minimum

	NS	@

	A	      172.17.56.249 ;a.com的ip为172.17.56.249

www     A             172.17.56.249 ;www.a.com的ip解析为172.17.56.249

@       MX      10    mx.a.com.     ;a.com的mx记录为mx.a.com

	AAAA	      ::1

[root@izj6c1w3z30pendgik4p4vz ~]# cat /var/named/172.17.56.zone

$TTL 86400

@       IN      SOA     localhost a.com. (

                         2014031101

                         2H

                         10M

                         7D

                         1D )

                 IN      NS      localhost.

249                  IN      PTR     a.com ;172.17.56.249查询后得到的域名是a.com

249                IN      PTR     www.a.com. ;172.17.56.249查询后得到的域名是www.a.com

systemctl  start  named

1、修改dns配置/etc/resolv.conf

[root@izj6c1w3z30pendgik4p4vz ~]# cat /etc/resolv.conf

options timeout:2 attempts:3 rotate single-request-reopen

nameserver 172.17.56.249

2、解析测试

[root@izj6c1w3z30pendgik4p4vz ~]# ping a.com -c 2

PING a.com (172.17.56.249) 56(84) bytes of data.

64 bytes from a.com.56.17.172.in-addr.arpa (172.17.56.249): icmp_seq=1 ttl=64 time=0.016 ms

64 bytes from a.com.56.17.172.in-addr.arpa (172.17.56.249): icmp_seq=2 ttl=64 time=0.048 ms

--- a.com ping statistics ---

2 packets transmitted, 2 received, 0% packet loss, time 1000ms

rtt min/avg/max/mdev = 0.016/0.032/0.048/0.016 ms

[root@izj6c1w3z30pendgik4p4vz ~]# ping www.a.com -c 2

PING www.a.com (172.17.56.249) 56(84) bytes of data.

64 bytes from www.a.com (172.17.56.249): icmp_seq=1 ttl=64 time=0.019 ms

64 bytes from www.a.com (172.17.56.249): icmp_seq=2 ttl=64 time=0.052 ms

--- www.a.com ping statistics ---

2 packets transmitted, 2 received, 0% packet loss, time 999ms

rtt min/avg/max/mdev = 0.019/0.035/0.052/0.017 ms

[root@izj6c1w3z30pendgik4p4vz ~]# nslookup  a.com

Server:		172.17.56.249

Address:	172.17.56.249#53

Name:	a.com

Address: 172.17.56.249

[root@izj6c1w3z30pendgik4p4vz ~]# dig  www.a.com

; <<>> DiG 9.9.4-RedHat-9.9.4-73.el7_6 <<>> www.a.com

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56816

;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 3

;; OPT PSEUDOSECTION:

; EDNS: version: 0, flags:; udp: 4096

;; QUESTION SECTION:

;www.a.com.			IN	A

;; ANSWER SECTION:

www.a.com.		86400	IN	A	172.17.56.249

;; AUTHORITY SECTION:

a.com.			86400	IN	NS	a.com.

;; ADDITIONAL SECTION:

a.com.			86400	IN	A	172.17.56.249

a.com.			86400	IN	AAAA	::1

;; Query time: 0 msec

;; SERVER: 172.17.56.249#53(172.17.56.249)

;; WHEN: Wed Jun 05 09:58:34 CST 2019

;; MSG SIZE  rcvd: 112

[root@izj6c1w3z30pendgik4p4vz ~]# cat /etc/named.conf

#增加一个反向解析，即根据ip查域名（不需要的话可以不设置）

zone "92.129.149.in-addr.arpa" IN {

    type master;

    file "149.129.92.zone";

};

[root@izj6c1w3z30pendgik4p4vz ~]# cat   /var/named/149.129.92.zone

$TTL 86400

@       IN      SOA     localhost a.com. (

                         2014031101

                         2H

                         10M

                         7D

                         1D )

                 IN      NS      localhost.

239                  IN      PTR     a.com ;149.129.92.239查询后得到的域名是a.com

239                IN      PTR     www.a.com. ;149.129.92.239查询后得到的域名是www.a.com

[root@izj6c1w3z30pendgik4p4vz ~]# cat /var/named/a.com.zone

$TTL 1D

@	IN SOA	@ root.a.com. (

					0	; serial

					1D	; refresh

					1H	; retry

					1W	; expire

					3H )	; minimum

	NS	@

	A	      149.129.92.239

www     A             149.129.92.239

@       MX      10    mx.a.com.     ;a.com的mx记录为mx.a.com

	AAAA	      ::1

#重启bind

systemctl  restart named