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<p><FONT class=normalfont><B><font color=blue>DNS服务器配置</font></B></FONT><BR><FONT class=smallfont color=#ff9900>2004-04-23 15:18 pm</FONT><BR><FONT class=normalfont>作者：作者<br>来自：Linux知识宝库<br>联系方式：无名<br><br> 在查阅许多DNS配置手册后,无法是照办还是修改，我始终没有配置正确,总是正向解析无法解析.最后,在一次配置中,突然灵机一动,终于配置成功。(2002-12-12 11:47:50) By Angelhua<br>
<br>
下面是我配置DNS的实例:<br>
<br>
1 所需配置文件:<br>
<br>
/etc/named.conf 系统自带，需要配置<br>
/etc/resolv.conf 系统自带，需要配置<br>
/var/named/myqmail.com.db 系统没有，自已创建<br>
/var/named/db.192.168.0.198 系统没有，自已创建<br>
/var/named/named.local 系统自带，不需要修改<br>
/var/named/named.ca 系统自带，不需要修改<br>
<br>
2 相关工具<br>
<br>
nslookup<br>
说明：检测DNS是否配置正确的工具，系统自带。<br>
<br>
3 配置方案<br>
<br>
3.1 /etc/named.conf<br>
<br>
说明：DNS主配置文件，定义了域数据库信息的基本参数和源点，该文件可以存放在本地或远程的服务器上。源文件：<br>
<br>
<br>
// generated by named-bootconf.pl <br>
<br>
options { <br>
directory "/var/named"; <br>
/* <br>
* If there is a firewall between you and nameservers you want <br>
* to talk to, you might need to uncomment the query-source <br>
* directive below. Previous versions of BIND always asked <br>
* questions using port 53, but BIND 8.1 uses an unprivileged <br>
* port by default. <br>
*/ <br>
// query-source address * port 53; <br>
}; <br>
<br>
// <br>
// a caching only nameserver config <br>
// <br>
controls { <br>
inet 127.0.0.1 allow { localhost; } keys { rndckey; }; <br>
}; <br>
zone "." IN { <br>
type hint; <br>
file "named.ca"; <br>
}; <br>
<br>
zone "localhost" IN { <br>
type master; <br>
file "localhost.zone"; <br>
allow-update { none; }; <br>
}; <br>
<br>
zone "0.0.127.in-addr.arpa" IN { <br>
type master; <br>
file "named.local"; <br>
allow-update { none; }; <br>
}; <br>
zone "myqmail.com" IN { <br>
type master; <br>
file "myqmail.com.db"; <br>
allow-update { none;}; <br>
}; <br>
zone "0.168.192.in-addr.arpa" IN{ <br>
type master; <br>
file "db.192.168.0.198"; <br>
allow-update { none;}; <br>
}; <br>
<br>
include "/etc/rndc.key"; <br>
<br>
3.2 /var/named/myqmail.com.db<br>
<br>
说明：正向解析配置文件,即实现域名到IP的对应。源文件：<br>
<br>
<br>
$TTL 86400 <br>
@ IN SOA www.myqmail.com. myqmail.com. ( <br>
2002103000 ; Serial <br>
28800 ; Refresh <br>
14400 ; Retry <br>
3600000 ; Expire <br>
86400 ) ; Minimum <br>
IN NS www.myqmail.com. <br>
localhost IN A 127.0.0.1 <br>
www IN A 192.168.0.198 <br>
<br>
3.3 /var/named/db.192.168.0.198<br>
<br>
说明：DNS反向解析配置文件，即实现IP地址很域名的映射。源文件：<br>
<br>
<br>
$TTL 86400 <br>
@ IN SOA www.myqmail.com. myqmail.com. ( <br>
2002103000 ; Serial <br>
28800 ; Refresh <br>
14400 ; Retry <br>
3600000 ; Expire <br>
86400 ) ; Minimum <br>
IN NS www.myqmail.com. <br>
198 IN PTR www.myqmail.com. <br>
<br>
3.4 /etc/resolv.conf<br>
<br>
说明：指定域名服务器的IP和搜索顺序。源文件：<br>
<br>
<br>
search myqmail.com <br>
nameserver 192.168.0.198 <br>
<br>
4 测试及管理办法<br>
<br>
4.1 测试方法<br>
<br>
1. 修改完DNS的配置文件，需要执行/etc/rc.d/init.d/named restart来使更改生效。<br>
<br>
2. nslookup：测试正向、反向的解析是否正常<br>
<br>
5 小结<br>
<br>
DNS服务是许多服务的基础，所以我刚开始linux服务器时,就着手配置DNS服务器。在不懂如何开始时，就拚命上网查相关配置文档。但我犯错了。因为我的DNS是用在局域网中，根本不连接Internet，仅仅限于局域网中为各个部门的各主机及服务器作解析用。但是许多网上资料都是针对有DNS服务器来配置的，也就是说是一种层层解析方式，与我的配置思路不一样。在耗用了许多时间的情况下，我终于成功地配置了自己的DNS服务器。希望我的配置实例对大家有很好的帮助。<br>
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