搭建DNS服务器

2019-12-09

搭建DNS服务器

环境:CentOS 7.5
防火墙状态:已关闭
安装bind

1	yum -y install bind*

修改主配置文件

$ vim /etc/named.conf
-------------------
options {
#       listen-on port 53 { 127.0.0.1; };
        listen-on port 53 { any; }; //修改为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";
        recursing-file  "/var/named/data/named.recursing";
        secroots-file   "/var/named/data/named.secroots";
#       allow-query     { localhost; };
        allow-query     { any; }; //修改为any

        /* 
         - 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";
};

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

修改区域文件 /etc/named.rfc1912.zones，在这个文件里面最后面添加正向解析域和反向解析域，在文件末尾加入以下代码，设置一个域名为luprivate.com的正向解析域，dns类型为master，文件名为luprivate.com.zone,不允许自动更新。设置反向解析域，dns类型为master，文件名为192.168.56.11.arpa,不允许自动更新。

$ vim /etc/named.rfc1912.zones 
----------------------------
zone "localhost.localdomain" IN {
        type master;
        file "named.localhost";
        allow-update { none; };
};

zone "localhost" IN {
        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 {
        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 "0.in-addr.arpa" IN {
        type master;
        file "named.empty";
        allow-update { none; };
};

zone "luprivate.com" IN {
        type master;
        file "luprivate.com.zone";
        allow-update { none; };
};

zone "11.56.168.192.in-addr.arpa" IN {
        type master;
        file "192.168.56.11.arpa";
        allow-update { none; };
};

修改解析数据文件

1	$ vim /var/named/luprivate.com.zone
2	---------------------------------
3	$TTL 1D
4	@ IN SOA ns.luprivate.com. root (
5	0 ; serial
6	1D ; refresh
7	1H ; retry
8	1W ; expire
9	3H ) ; minimum
10	@ IN NS ns.luprivate.com.
11	ns IN A 192.168.56.11
12	www IN A 192.168.56.11

$ vim /var/named/192.168.56.11.arpa
---------------------------------
$TTL 1D
@       IN SOA  dns.luprivate.com. admin.luprivate.com. (
                                        0       ; serial
                                        1D      ; refresh
                                        1H      ; retry
                                        1W      ; expire
                                        3H )    ; minimum
@       IN      NS      ns.luprivate.com.
116     IN      PTR     www.luprivate.com.

修改所有者

1	$ chown root:named luprivate.com.zone
2	$ chown root:named 192.168.56.11.arpa

修改/etc/resolv.conf

1	nameserver 192.168.56.11

修改/etc/hosts

1	192.168.56.11 luprivate.com

重启named服务

1	$ systemctl restart named

查看对应端口情况

1	$ netstat -anpu
2	Active Internet connections (servers and established)
3	Proto Recv-Q Send-Q Local Address Foreign Address
4	udp 0 0 0.0.0.0:5353 0.0.0.0:*
5	udp 0 0 0.0.0.0:36121 0.0.0.0:*
6	udp 0 0 0.0.0.0:839 0.0.0.0:*
7	udp 0 0 192.168.122.1:53 0.0.0.0:*
8	udp 0 0 10.0.3.15:53 0.0.0.0:*
9	udp 0 0 192.168.56.11:53 0.0.0.0:*
10	udp 0 0 127.0.0.1:53 0.0.0.0:*
11	udp 0 0 192.168.122.1:53 0.0.0.0:*
12	udp 0 0 0.0.0.0:67 0.0.0.0:*
13	udp 0 0 0.0.0.0:68 0.0.0.0:*
14	udp 0 0 0.0.0.0:111 0.0.0.0:*
15	udp6 0 0 :::839 :::*
16	udp6 0 0 ::1:53 :::*
17	udp6 0 0 :::111 :::*

测试DNS服务器是否搭建成功

1	linux下测试：
2	$ host www.luprivate.com
3	www.luprivate.com has address 192.168.56.11

windows下测试：（需在网卡DNS中加入192.168.56.11）
nslookup
> www.luprivate.com
服务器:  UnKnown
Address:  192.168.56.11

名称:    www.luprivate.com
Address:  192.168.56.11

部署完成