關(guān)于在Linux下如何搭建DNS服務(wù)器

更新時(shí)間：2023年04月20日 08:56:44 作者：魔笛Love

這篇文章主要介紹了關(guān)于在Linux下如何搭建DNS服務(wù)器,文中提供了部分實(shí)現(xiàn)代碼和解決思路,有一定的參考價(jià)值,需要的朋友快來一起看看吧

環(huán)境

操作系統(tǒng)：CentOS 7

IP地址：10.27.106.201

測(cè)試域名：aec.testuc.com

作用：主要提供解析aec.testuc.com域名的服務(wù)

安裝

yum -y install bind

修改配置文件

主配置文件

vim /etc/named.conf

主要修改以下兩個(gè)地方

listen-on port 53 { any; };

allow-query { any; };

//
// 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 port 53 { 127.0.0.1; };
        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; };
        # allow-query     { localhost; };

        /* 
         - 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.root.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";

區(qū)域配置文件，添加正向解析配置

vim /etc/named.rfc1912.zones

末尾添加如下配置：

zone "aec.starnetuc.com" IN {             #正向解析為"aec.starnetuc.com"
        type master;                      #類型：主緩存為master
        file "aec.starnetuc.com.zone";    #指定區(qū)域數(shù)據(jù)文件為aec.starnetuc.com.zone
        allow-update { none; };
};

正向區(qū)域數(shù)據(jù)文件

拷貝其他區(qū)域數(shù)據(jù)文件，保留源文件的權(quán)限和屬主的屬性復(fù)制

cp -a /var/named/named.localhost /var/named/aec.starnetuc.com.zone

修改該文件，結(jié)果如下：

$TTL 1D  	#有效解析記錄的生成周期
@       IN SOA  aec.starnetuc.com. root.aec.starnetuc.com. (
#@表示當(dāng)前的DNS區(qū)域名表示這個(gè)域名  
#SOA表示授權(quán)信息開啟 
# 后面表示郵件地址因?yàn)锧有特殊含義 所以使用.代替 
                                        0       ; serial  #更新序列號(hào)，可以是10以內(nèi)的整數(shù)
                                        1D      ; refresh #刷新時(shí)間，重新下載地址數(shù)據(jù)的間隔
                                        1H      ; retry   #重試延遲，下載失敗后的重試延遲
                                        1W      ; expire  #失效時(shí)間，超過該時(shí)間仍無法下載則放棄
                                        3H )    ; minimum #無效解析記錄的生存周期
        IN      NS      aec.starnetuc.com. #記錄當(dāng)前區(qū)域DNS服務(wù)器的名稱
        IN      MX 10   aec.starnetuc.com. #MX為郵件服務(wù)器 10表示優(yōu)先級(jí) 數(shù)字越大優(yōu)先級(jí)越低
        IN      A       10.27.106.214      #記錄正向解析域名對(duì)應(yīng)的IP，即將域名與IP綁捆

檢查配置是否正確

named-checkconf -z /etc/named.conf

僅檢查語法不檢查邏輯關(guān)系。當(dāng)顯示的全為0時(shí)表示沒有語法錯(cuò)誤

zone localhost.localdomain/IN: loaded serial 0
zone localhost/IN: loaded serial 0
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: loaded serial 0
zone 1.0.0.127.in-addr.arpa/IN: loaded serial 0
zone 0.in-addr.arpa/IN: loaded serial 0
zone aec.starnetuc.com/IN: loaded serial 0

啟動(dòng)DNS服務(wù)

啟動(dòng)前，檢查防火墻、SELINUX安全模式是否是關(guān)閉或允許狀態(tài)

啟動(dòng)

systemctl start named
systemctl enable named

查看53號(hào)監(jiān)聽端口是否開啟

測(cè)試

將測(cè)試系統(tǒng)的DNS改為10.27.106.201，然后去

ping aec.starnetuc.com

PING aec.starnetuc.com (10.27.106.214) 56(84) bytes of data.
64 bytes from 10.27.106.214 (10.27.106.214): icmp_seq=1 ttl=64 time=1024 ms
64 bytes from 10.27.106.214 (10.27.106.214): icmp_seq=2 ttl=64 time=4.31 ms
64 bytes from 10.27.106.214 (10.27.106.214): icmp_seq=3 ttl=64 time=5.53 ms

表明配置成功。

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