架構師成長之路6.2 DNS配置文件

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架構師成長之路6.2 DNS 配置文件

• /etc/hosts　　主機的一個文件列表 ，添加記錄如:111.13.100.92   www.baidu.com

　　　　對於簡單的主機名解析（點分表示法），默認在請求DNS或NIS網絡域名服務器前，/etc/named.conf 一般會告訴程序先查看此文件。

• /etc/resolv.conf　轉換程序配置文件

　　　　在配置程序請求BIND域名查詢服務查詢主機名時，必須告訴程序使用哪一個域名服務器和IP地址來完成這個任務

• /etc/named.conf　BIND主文件

　　　　設置通常的name參數，指向該服務器使用的域數據庫的信息源

• /var/named/named.ca　　根域名配置服務器指向文件

　　　　指向根域名配置服務器，用於告訴緩存服務器初始化

• /var/named/localhost.zone　   localhost區正向域名解析文件

　　　　用於將本地IP地址（127.0.0.1）轉換爲本地回送IP地址（127.0.0.1）

• /var/named/name.local　　localhost區反向域名解析文件

　　　　用於將localhost名字轉換爲本地回送IP地址（127.0.0.1）

• /etc/named.rfc1912.zones　　區塊設置文件

 

//
// 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 { 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     { 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.iscdlv.key";

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

        pid-file "/run/named/named.pid";
        session-keyfile "/run/named/session.key";
};

logging {
        channel default_debug {
};

zone "." IN {
        type hint;
        file "named.ca";
};

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

 

; <<>> DiG 9.9.4-RedHat-9.9.4-38.el7_3.2 <<>> +bufsize=1200 +norec @a.root-servers.net
; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17380
;; flags: qr aa; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 27

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1472
;; QUESTION SECTION:
;.                              IN      NS

;; ANSWER SECTION:
.                       518400  IN      NS      a.root-servers.net.
.                       518400  IN      NS      b.root-servers.net.
.                       518400  IN      NS      c.root-servers.net.
.                       518400  IN      NS      d.root-servers.net.
.                       518400  IN      NS      e.root-servers.net.
.                       518400  IN      NS      f.root-servers.net.
.                       518400  IN      NS      g.root-servers.net.
.                       518400  IN      NS      h.root-servers.net.
.                       518400  IN      NS      i.root-servers.net.
.                       518400  IN      NS      j.root-servers.net.
.                       518400  IN      NS      k.root-servers.net.
.                       518400  IN      NS      l.root-servers.net.
;; ADDITIONAL SECTION:
a.root-servers.net.     3600000 IN      A       198.41.0.4
a.root-servers.net.     3600000 IN      AAAA    2001:503:ba3e::2:30
b.root-servers.net.     3600000 IN      A       192.228.79.201
b.root-servers.net.     3600000 IN      AAAA    2001:500:84::b
c.root-servers.net.     3600000 IN      A       192.33.4.12
c.root-servers.net.     3600000 IN      AAAA    2001:500:2::c
d.root-servers.net.     3600000 IN      A       199.7.91.13
d.root-servers.net.     3600000 IN      AAAA    2001:500:2d::d
e.root-servers.net.     3600000 IN      A       192.203.230.10
e.root-servers.net.     3600000 IN      AAAA    2001:500:a8::e
f.root-servers.net.     3600000 IN      A       192.5.5.241
f.root-servers.net.     3600000 IN      AAAA    2001:500:2f::f
g.root-servers.net.     3600000 IN      A       192.112.36.4
g.root-servers.net.     3600000 IN      AAAA    2001:500:12::d0d
h.root-servers.net.     3600000 IN      A       198.97.190.53
h.root-servers.net.     3600000 IN      AAAA    2001:500:1::53
i.root-servers.net.     3600000 IN      A       192.36.148.17
i.root-servers.net.     3600000 IN      AAAA    2001:7fe::53
j.root-servers.net.     3600000 IN      A       192.58.128.30
j.root-servers.net.     3600000 IN      AAAA    2001:503:c27::2:30
k.root-servers.net.     3600000 IN      A       193.0.14.129
k.root-servers.net.     3600000 IN      AAAA    2001:7fd::1
l.root-servers.net.     3600000 IN      A       199.7.83.42
l.root-servers.net.     3600000 IN      AAAA    2001:500:9f::42
m.root-servers.net.     3600000 IN      A       202.12.27.33
m.root-servers.net.     3600000 IN      AAAA    2001:dc3::35

;; Query time: 18 msec
;; SERVER: 198.41.0.4#53(198.41.0.4)
;; WHEN: Po kvě 22 10:14:44 CEST 2017
;; MSG SIZE  rcvd: 811

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