CentOS7下DNS服务器的搭建（局域网DNS、辅助DNS、缓存DNS）

旧城等待， 2023-06-22 09:27 34阅读 0赞

一、DNS服务器的安装与测试

二、配置文件详解

三、配置内网（局域网）DNS

四．辅DNS的配置

五、缓存DNS配置

--------------------

### **一、DNS服务器的安装与测试** ###

**1.查看是否安装DNS软件包**

\[root@mylocalhost ~\]\# rpm -qa|grep bind

![20191215185519811.png][]

未安装：bind-9.9.4-61.el7\_5.1.x86\_64

**2.安装DNS服务器软件包bind**

\[root@mylocalhost ~\]\# yum install bind

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70][]

**3.再次查看bind包是否安装**

\[root@mylocalhost ~\]\# rpm -qa|grep bind

![20191215185816599.png][]

已安装。

**4.启动DNS服务（说明：DNS服务的守护进程为named）**

\[root@mylocalhost ~\]\# systemctl start named.service

**5.将DNS设为开机自启动**

\[root@mylocalhost ~\]\# systemctl enable named.service

Created symlink from /etc/systemd/system/multi-user.target.wants/named.service to /usr/lib/systemd/system/named.service.

![20191215185910721.png][]

**6.查看DNS服务的状态**

\[root@mylocalhost ~\]\# systemctl status named.service

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 1][]

**7.测试域名解析（能够正确解析外网和本机）**

\[root@www ~\]\# nslookup www.baidu.com

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 2][]

\[root@www ~\]\# nslookup www.sohu.com

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 3][]

\[root@www ~\]\# nslookup localhost

![20191215190233427.png][]

\[root@www ~\]\# nslookup 127.0.0.1

![20191215190247228.png][]

## ##

### **二、配置文件详解** ###

**1.配置文件/etc/named.conf详解**

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

// named.conf

// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS

// server as a caching only nameserver (as a localhost DNS resolver only).

// See /usr/share/doc/bind\*/sample/ for example named configuration files.

// See the BIND Administrator's Reference Manual (ARM) for details about the

// configuration located in /usr/share/doc/bind-\{version\}/Bv9ARM.html

options \{                                                     \#选项

listen-on port 53 \{ 127.0.0.1; \};                        \#服务监听端口为53

listen-on-v6 port 53 \{ ::1; \};                              \#服务监听端口为53（ipv6）

directory "/var/named";                           \#配置文件存放的目录

dump-file "/var/named/data/cache\_dump.db";           \#解析过的内容的缓存

statistics-file "/var/named/data/named\_stats.txt";      \#静态缓存（一般不用）

memstatistics-file "/var/named/data/named\_mem\_stats.txt";   \#静态缓存（放内存里的,一般不用）

allow-query \{ localhost; \};                                 \#允许连接的客户机

recursion yes;                                            \#递归查找

dnssec-enable yes;                                    \#DNS加密

dnssec-validation yes;                              \#DNS加密高级算法

dnssec-lookaside auto;                             \#DNS加密的相关东西

/\* Path to ISC DLV key \*/

bindkeys-file “/etc/named.iscdlv.key”;           \#加密用的key（私钥公钥的加密,很强）

\};

logging \{                           \#日志

channel default\_debug \{

file "data/named.run";           \#运行状态文件

severity dynamic;            \#静态服务器地址（根域）

\};

zone "." IN \{                     \#根域解析

type hint;

file "named.ca";                       \#根域配置文件

\};

include "/etc/named.rfc1912.zones";    \#扩展配置文件（新开域名）

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

**2.扩展配置文件/etc/named.rfc1912.zones详解**

zone "localhost.localdomain" IN \{ \#本地主机全名解析

type master;                    \#类型为主域

file "named.localhost";           \#域配置文件（文件存放在/var/named目录中）

allow-update \{ none; \};           \#不允许客户端更新

\};

zone "localhost" IN \{               \#本地主机名解析

type master;

file "named.localhost";

allow-update \{ none; \};

\};

zone "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN \{

\#ipv6本地地址反向解析

type master;

file "named.loopback";

allow-update \{ none; \}; zone "1.0.0.127.in-addr.arpa" IN \{   \#本地地址反向解析

type master;

file "named.loopback";

allow-update \{ none; \};

\};

zone "0.in-addr.arpa" IN \{               \#本地全网地址反向解析（和/域更新用的）

type master;

file "named.empty";

allow-update \{ none; \};

\};

### **三、配置内网（局域网）DNS** ###

本局域网有6台机器，定义：域名为abc.com，主机名分别为：pc1、pc2、pc3、pc4、pc5、pc6，其中pc1为域名服务器，负责对局域网中的6台机器进行域名解析，其IP地址为：192.168.190.10，pc2~pc6主机的IP地址分别为192.168.190.11、192.168.190.12、192.168.190.13、192.168.190.14、192.168.190.15。

**1.先把子网ip改为192.168.190.0**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 4][]

**2.改主机pc1的IP地址为静态地址**

\[root@pc1 named\]\# vi /etc/sysconfig/network-scripts/ifcfg-ens33

TYPE=Ethernet

BOOTPROTO=static

DEFROUTE=yes

IPV4\_FAILURE\_FATAL=no

IPV6INIT=yes

IPV6\_AUTOCONF=yes

IPV6\_DEFROUTE=yes

IPV6\_FAILURE\_FATAL=no

NAME=ens33

UUID=a461b66a-ab58-405c-9feb-abb2e888f40d

DEVICE=ens33

ONBOOT=yes

PROXY\_METHOD=none

BROWSER\_ONLY=no

ZONE=public

IPADDR=192.168.190.10

PREFIX=24

GATEWAY=192.168.190.2

DNS=192.168.190.10

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 5][]

**3.编辑/etc/resolv.conf**

\[root@pc1 named\]\# vim /etc/resolv.conf

\# Generated by NetworkManager

nameserver 192.168.190.10

![20191215191241689.png][]

**4.重启网卡或重启系统**

(1)重启网卡

\[root@pc1 named\]\# ifdown ens33

成功断开设备 'ens33'。

\[root@pc1 named\]\# ifup ens33

连接已成功激活（D-Bus 活动路径：/org/freedesktop/NetworkManager/ActiveConnection/3）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 6][]

(2)重启系统

\[root@pc1 named\]\# reboot

**5.编辑配置文件/etc/named.conf**

root@www ~\]\# vim /etc/named.conf

options \{

listen-on port 53 \{ any; \};

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";

allow-query     \{ any; \};

allow-transfer \{ 192.168.190.0/24;  \};

保存退出（：wq）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 7][]

**6.编辑扩展配置文件/etc/named.rfc1912.zones**

（1）添加abc.com域的正向解析和方向解析

\[root@www ~\]\# vim /etc/named.rfc1912.zones

// named.rfc1912.zones:

// Provided by Red Hat caching-nameserver package

// ISC BIND named zone configuration for zones recommended by

// RFC 1912 section 4.1 : localhost TLDs and address zones

// and http://www.ietf.org/internet-drafts/draft-ietf-dnsop-default-local-zones-02.txt

// See /usr/share/doc/bind\*/sample/ for example named configuration files.

zone "localhost.localdomain" IN \{

type master;

file "named.localhost";

allow-update \{ none; \};

\};

zone "localhost" IN \{

type master;

file "named.localhost";

allow-update \{ none; \};

\};

zone "abc.com" IN \{//说明：正向解析域

type master;

file "named.abc.com.zones";

allow-transfer \{ 192.168.190.11; \};

allow-update \{ none; \};

\};

zone "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN \{

type master;

file "named.loopback";

allow-update \{ none; \};

\};

zone "1.0.0.127.in-addr.arpa" IN \{

type master;

file "named.loopback";

allow-update \{ none; \};

\};

zone "190.168.192.in-addr.arpa" IN \{//说明：反向解析域

type master;

file "named.190.168.192.zones";

allow-transfer \{ 192.168.190.11; \};

allow-update \{ none; \};

\};

zone "0.in-addr.arpa" IN \{

type master;

file "named.empty";

allow-update \{ none; \};

\};

//保存退出(:wq)

**7.编辑区文件**

(1)编辑正向解析区文件

\[root@www named\]\# ls

data  dynamic  named.ca  named.empty  named.localhost  named.loopback  slaves

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 8][]

(2)更换所属组

\[root@www named\]\# cp -p named.localhost named.abc.com.zonesll

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 9][]

\[root@www named\]\# chgrp named named.190.168.192.zones

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 10][]

\[root@www named\]\# vim /var/named/named.abc.com.zones

$TTL 1D

@     IN SOA     @  root.pc1.abc.com. (

0       ; serial

1D    ; refresh

1H    ; retry

1W   ; expire

3H )  ; minimum

IN     NS    pc1.abc.com.

pc1  IN     A      192.168.190.10

pc2  IN     A      192.168.190.11

pc3  IN     A      192.168.190.12

pc4  IN     A      192.168.190.13

pc5  IN     A      192.168.190.14

pc6  IN     A      192.168.190.15

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 11][]

(3)编辑反向解析区文件

\[root@www named\]\# vim /var/named/named.190.168.192.zones

$TTL 1D

@     IN SOA     @ root.pc1.abc.com. (

0       ; serial

1D    ; refresh

1H    ; retry

1W   ; expire

3H )  ; minimum

IN     NS    pc1.abc.com.

10    IN     PTR  pc1.abc.com.

11    IN     PTR  pc2.abc.com.

12    IN     PTR  pc3.abc.com.

13    IN     PTR  pc4.abc.com.

14    IN     PTR  pc5.abc.com.

15    IN     PTR  pc6.abc.com.

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 12][]

## ##

**8.重启DNS服务**

\[root@www named\]\# systemctl restart named

## ##

**9.修改主机名为pc1并查看是否修改成功**

\[root@pc1 named\]\# hostnamectl set-hostname pc1

\[root@pc1 named\]\# hostname

![20191215211422865.png][]

**10.编辑NetworkManager管理工具的配置文件，不让其分配DNS**

\[root@pc1 named\]\# vim /etc/NetworkManager/NetworkManager.conf

\# Configuration file for NetworkManager.

\# See "man 5 NetworkManager.conf" for details.

\# The directories /usr/lib/NetworkManager/conf.d/ and /var/run/NetworkManager/conf.d/

\# can contain additional configuration snippets installed by packages. These files are

\# read before NetworkManager.conf and have thus lowest priority.

\# The directory /etc/NetworkManager/conf.d/ can contain additional configuration

\# snippets. Those snippets are merged last and overwrite the settings from this main

\# file.

\# The files within one conf.d/ directory are read in asciibetical order.

\# If /etc/NetworkManager/conf.d/ contains a file with the same name as

\# /usr/lib/NetworkManager/conf.d/, the latter file is shadowed and thus ignored.

\# Hence, to disable loading a file from /usr/lib/NetworkManager/conf.d/ you can

\# put an empty file to /etc with the same name. The same applies with respect

\# to the directory /var/run/NetworkManager/conf.d where files in /var/run shadow

\# /usr/lib and are themselves shadowed by files under /etc.

\# If two files define the same key, the one that is read afterwards will overwrite

\# the previous one.

\[main\]

\#plugins=ifcfg-rh,ibft

dns=none

\[logging\]

\# When debugging NetworkManager, enabling debug logging is of great help.

\# Logfiles contain no passwords and little sensitive information. But please

\# check before posting the file online. You can also personally hand over the

\# logfile to a NM developer to treat it confidential. Meet us on \#nm on freenode.

\# Please post full logfiles except minimal modifications of private data.

\# You can also change the log-level at runtime via

\#   $ nmcli general logging level TRACE domains ALL

\# However, usually it's cleaner to enable debug logging

\# in the configuration and restart NetworkManager so that

\# debug logging is enabled from the start.

\# You will find the logfiles in syslog, for example via

\#   $ journalctl -u NetworkManager

\# Note that debug logging of NetworkManager can be quite verbose. Some messages

\# might be rate-limited by the logging daemon (see RateLimitIntervalSec, RateLimitBurst

\# in man journald.conf).

\#level=TRACE

\#domains=ALL

**11.DNS测试**

(1)命令测试

\[root@pc1 named\]\# nslookup pc1.abc.com

Server:     192.168.190.10

Address:  192.168.190.10\#53

Name:     pc1.abc.com

Address: 192.168.190.10

![2019121521170932.png][]

\[root@pc1 named\]\# nslookup pc3.abc.com

Server:     192.168.190.10

Address:  192.168.190.10\#53

Name:     pc3.abc.com

Address: 192.168.190.12

![20191215211725965.png][]

\[root@pc1 named\]\# nslookup 192.168.190.13

Server:     192.168.190.10

Address:  192.168.190.10\#53

13.190.168.192.in-addr.arpa  name = pc4.abc.com.

成功!！！

![20191215211851519.png][]

### **四．辅DNS的配置** ###

在之前将计算机配置为的基础上，将IP地址为192.168.190.11的计算机pc2配置为辅助DNS服务器，并从IP地址为192.168.190.10的主DNS服务器pc1复制正向解析和反向解析的区文件named.abc.com.zones和named.190.168.192.zones。

**1.安装DNS软件包bind**

\[root@www ~\]\# yum install bind

**2.编辑配置文件/etc/named.conf**

root@www ~\]\# vim /etc/named.conf

options \{

listen-on port 53 \{ any; \};

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";

allow-query     \{ any; \};

allow-transfer \{ none;  \};

保存退出（：wq）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 13][]

**3.编辑扩展配置文件/etc/named.rfc1912.zones**

（1）定义abc.com域的正向解析和方向解析

\[root@www ~\]\# vim /etc/named.rfc1912.zones

// named.rfc1912.zones:

// Provided by Red Hat caching-nameserver package

// ISC BIND named zone configuration for zones recommended by

// RFC 1912 section 4.1 : localhost TLDs and address zones

// and http://www.ietf.org/internet-drafts/draft-ietf-dnsop-default-local-zones-02.txt

// See /usr/share/doc/bind\*/sample/ for example named configuration files.

zone "localhost.localdomain" IN \{

type master;

file "named.localhost";

allow-update \{ none; \};

\};

zone "localhost" IN \{

type master;

file "named.localhost";

allow-update \{ none; \};

\};

zone "abc.com" IN \{

type slave;

file "slaves/named.abc.com.zones";

masters \{ 192.168.190.10; \};

\};

zone "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN \{

type master;

file "named.loopback";

allow-update \{ none; \};

\};

zone "1.0.0.127.in-addr.arpa" IN \{

type master;

file "named.loopback";

allow-update \{ none; \};

\};

zone "190.168.192.in-addr.arpa" IN \{//说明：反向解析域

type slave;

file "slaves/named.190.168.192.zones";

masters \{ 192.168.190.10; \};

\};

zone "0.in-addr.arpa" IN \{

type master;

file "named.empty";

allow-update \{ none; \};

\};

//保存退出(:wq)

**4.在主DNS的区域配置文件中（/etc/named.rfc1912.zones)允许该从服务器的更新要求。**

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

zone "abc.com" IN \{

type master;

file "named.abc.com";

allow-update \{ 192.168.190.11; \};//允许从服务器的更新要求

\};

zone "192.168.192.in-addr.arpa" IN \{

type master;

file "named.192.168.144.zones";

allow-update \{ 192.168.190.11; \};

\};

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 14][]

**5.关闭防火墙和安全**

主服务器和从服务器的都要关闭

\[root@pc2 ~\]\# systemctl stop firewalld

\[root@pc2 ~\]\# setenforce 0

![20191215213039559.png][]

![20191215213047832.png][]

**6.改主机pc2的IP地址为静态地址**

\[root@pc2 named\]\# vi /etc/sysconfig/network-scripts/ifcfg-ens33

TYPE=Ethernet

BOOTPROTO=static

DEFROUTE=yes

IPV4\_FAILURE\_FATAL=no

IPV6INIT=yes

IPV6\_AUTOCONF=yes

IPV6\_DEFROUTE=yes

IPV6\_FAILURE\_FATAL=no

NAME=ens33

UUID=a461b66a-ab58-405c-9feb-abb2e888f40d

DEVICE=ens33

ONBOOT=yes

PROXY\_METHOD=none

BROWSER\_ONLY=no

ZONE=public

IPADDR=192.168.190.11

PREFIX=24

GATEWAY=192.168.190.2

DNS=192.168.190.11

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2R5d182NjY2NjY_size_16_color_FFFFFF_t_70 15][]

**7.编辑/etc/resolv.conf**

\[root@pc2 ~\]\#  vim /etc/resolv.conf

\# Generated by NetworkManager

nameserver 192.168.190.10

**8.重启网卡或重启系统**

(1)重启网卡

\[root@pc2 named\]\# ifdown ens33

成功断开设备 'ens33'。

\[root@pc2 named\]\# ifup ens33

连接已成功激活（D-Bus 活动路径：/org/freedesktop/NetworkManager/ActiveConnection/3）

**9.重启DNS服务**

\[root@pc2 ~\]\# systemctl restart named

**10.查看/var/named/slaves/文件夹下是否传过来正向解析和反向解析的区文件**

\[root@pc2 ~\]\# ls /var/named/slaves/

named.190.168.192.zones  named.abc.com.zones

![20191215213413535.png][]

**11.DNS测试**

\[root@pc2 named\]\# nslookup pc1.abc.com

Server:     192.168.190.10

Address:  192.168.190.10\#53

Name:     pc1.abc.com

Address: 192.168.190.10

![20191215213430884.png][]

\[root@pc2 named\]\# nslookup pc3.abc.com

Server:     192.168.190.10

Address:  192.168.190.10\#53

Name:     pc3.abc.com

Address: 192.168.190.12

![20191215213634752.png][]

\[root@pc2 named\]\# nslookup 192.168.190.13

Server:     192.168.190.10

Address:  192.168.190.10\#53

13.190.168.192.in-addr.arpa  name = pc4.abc.com.

成功!！！

![20191215213702932.png][]

## **五、缓存DNS配置** ##

在之前将计算机配置为的基础上，将IP地址为192.168.190.12的计算机配置为缓存DNS服务器，将解析请求转发到主域名服务器192.168.190.10

**1.  安装DNS软件包bind**

\[root@www ~\]\# yum install bind

**2.  编辑配置文件/etc/named.conf**

root@www ~\]\# vim /etc/named.conf

options \{

listen-on port 53 \{ any; \};

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";

//全局转发

allow-query     \{ any; \};

forward first; //首先转发，转发器不响应，则递归查询。取值为only时只转发。

forwarders  \{ 192.168.190.10;  \};

保存退出（：wq）

**3.编辑扩展配置文件/etc/named.rfc1912.zones**

\[root@www ~\]\# vim /etc/named.rfc1912.zones

在最后加上：

//转发指定域

zone "abc.com" IN \{

type forward;//转发

forward first;

forwarders \{ 192.168.190.10; \};

\};

//保存退出(:wq)

**4.改主机pc3的IP地址为静态地址(192.168.190.12)**

\[root@pc1 named\]\# vi /etc/sysconfig/network-scripts/ifcfg-eno16777736

BOOTPROTO=static

…….

IPADDR=192.168.190.12

PREFIX=24

GATEWAY=192.168.190.2

DNS=192.168.190.12

**5.重启网卡或重启系统**

\[root@pc3 named\]\# ifdown ens33

成功断开设备 'ens33'。

\[root@pc3 named\]\# ifup ens33

连接已成功激活（D-Bus 活动路径：/org/freedesktop/NetworkManager/ActiveConnection/3）

\[root@pc3 named\]\#

**6.重启DNS服务**

\[root@www named\]\# systemctl restart named

**7.DNS测试**

\[root@pc1 named\]\# nslookup pc1.abc.com

Server:     192.168.190.10

Address:  192.168.190.10\#53

Name:     pc1.abc.com

Address: 192.168.190.10

\[root@pc1 named\]\# nslookup pc3.abc.com

Server:    192.168.190.10

Address:  192.168.190.10\#53

Name:     pc3.abc.com

Address: 192.168.190.12

\[root@pc1 named\]\# nslookup 192.168.190.13

Server:     192.168.190.10

Address:  192.168.190.10\#53

13.190.168.192.in-addr.arpa  name = pc4.abc.com.

成功!！！

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