Centos7 DNS神奇的配置

文件

[root@iff etc]# 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 {
        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; };

        /* 
         - 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";

[root@iff etc]# 

　　

文件

　　

[root@iff etc]# cat /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
// (c)2007 R W Franks
// 
// 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 "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 "179.108.30.129.in-addr.arpa" IN {
        type master;
        file "179.108.30.129.zone";
        allow-update { none; };
};

zone "iff.csttires.com.cn" IN {
        type master;
        file "iff.csttires.com.cn.zone";
        allow-update { none; };
};
zone "iff-web.csttires.com.cn" IN {
        type master;
        file "iff-web.csttires.com.cn.zone";
        allow-update { none; };
};

[root@iff etc]# 

　　

文件

[root@iff etc]# cat /var/named/iff.csttires.com.cn.zone 
$TTL 1D
@       IN SOA  iff.csttires.com.cn root (
                                        0       ; serial
                                        1D      ; refresh
                                        1H      ; retry
                                        1W      ; expire
                                        3H )    ; minimum
        NS      @
        A       127.0.0.1
        AAAA    ::1

    IN  A       129.30.108.179
[root@iff etc]# 

[root@iff named]# cat iff-web.csttires.com.cn.zone 
$TTL 1D
@       IN SOA  iff-web.csttires.com.cn root (
                                        0       ; serial
                                        1D      ; refresh
                                        1H      ; retry
                                        1W      ; expire
                                        3H )    ; minimum
        NS      @
        A       127.0.0.1
        AAAA    ::1

    IN  A       129.30.108.179
[root@iff named]# 

　　

文件

[root@iff etc]# cat /var/named/179.108.30.129.zone 
$TTL 600
@      IN  SOA @ iff.csttires.com.cn. (
                                        0       ; serial
                                        28800      ; refresh
                                        1H      ; retry
                                        1W      ; expire
                                        3H )    ; minimum
          NS     iff.csttires.com.cn.
     IN   PTR   iff.csttires.com.cn.

     IN   PTR   iff-web.csttires.com.cn.

[root@iff etc]#

　　

测试成功：

[root@iff etc]# nslookup 
> iff.csttires.com.cn
Server:         129.30.108.179
Address:        129.30.108.179#53

Name:   iff.csttires.com.cn
Address: 127.0.0.1
Name:   iff.csttires.com.cn
Address: 129.30.108.179

> iff-web.csttires.com.cn
Server:         129.30.108.179
Address:        129.30.108.179#53

Name:   iff-web.csttires.com.cn
Address: 127.0.0.1
Name:   iff-web.csttires.com.cn
Address: 129.30.108.179

 
[root@iff etc]# nslookup 
> 129.30.108.179
Server:         129.30.108.179
Address:        129.30.108.179#53

179.108.30.129.in-addr.arpa     name = iff.csttires.com.cn.

179.108.30.129.in-addr.arpa     name = iff-web.csttires.com.cn.

>

　常用命令：

yum -y install bind
rndc flush #清空DNS缓存
systemctl restart named
nslookup
host 129.30.108.179 #查看反向解析