这是本站的dns配置，但我有点地方没看懂

thizlinux

DNS服务器的设置
1． 编辑/etc/named.conf
// generated by named-bootconf.pl（这行声明是啥意思啊？谢谢！）

options {
directory "/var/named";
/*
* If there is a firewall between you and nameservers you want
* to talk to, you might need to uncomment the query-source
* directive below. Previous versions of BIND always asked
* questions using port 53, but BIND 8.1 uses an unprivileged
* port by default.
*/
// query-source address * port 53;
};

//
// a caching only nameserver config
//
controls {
inet 127.0.0.1 allow { localhost; } keys { rndckey; };
};
zone "." IN {
type hint;
file "named.ca";
};

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

zone "1.168.192.in-addr.arpa" IN {
type master;
file "named.mydomain.com.rev";
allow-update { none; };
};

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

zone "0.0.127.in-addr.arpa" IN {
type master;
file "named.local";
allow-update { none; };
};

include "/etc/rndc.key";（这句也没看懂，谢谢）


2. 编辑正向解析文件/var/named/named.mydomain.com
$TTL 86400
@ IN SOA my.mydomain.com. root.my.mydomain.com. (
1997022700 ; Serial
28800 ; Refresh
14400 ; Retry
3600000 ; Expire
86400 ) ; Minimum
IN NS my.mydomain.com.
IN MX 10 my.mydomain.com.

my IN A 192.168.1.50
www IN CNAME my.mydomain.com.
ftp IN CNAME my.mydomain.com.
smtp IN CNAME my.mydomain.com.
pop3 IN CNAME my.mydomain.com.

3. 编辑反向解析文件/var/named/named.mydomain.com.rev
$TTL 86400
@ IN SOA my.mydomain.com. root.ns.mydomain.com. (
1997022700 ; Serial
28800 ; Refresh
14400 ; Retry
3600000 ; Expire
86400 ) ; Minimum
IN NS my.mydomain.com.

50 IN PTR my.mydomain.com.

4. 编辑/var/named/named.local文件
$TTL 86400
@ IN SOA my.mydomain.com. root.my.mydomain.com. (
1997022700 ; Serial
28800 ; Refresh
14400 ; Retry
3600000 ; Expire
86400 ) ; Minimum
IN NS my.mydomain.com.

1 IN PTR localhost.

5. 编辑/etc/resolv.conf
# MADE-BY-RP-PPPOE　（就是这，这是啥意思啊？为啥要这样设？）谢谢
domain mydomain.com
nameserver 192.168.1.50
search localdomain

txkss

它是注釋行啊
意思是承受ppp鏈接後獲得的DNS地址變化吧

晨想

// generated by named-bootconf.pl（这行声明是啥意思啊？谢谢！）
这个文件是用这个脚本生成的，不是手写的。只是告诉你而已。没意义。

include "/etc/rndc.key";（这句也没看懂，谢谢）
把/etc/rndc.key的内容也包括进来这个配置文件。


# MADE-BY-RP-PPPOE　（就是这，这是啥意思啊？为啥要这样设？）谢谢
只是注释而已啦。呵呵。。。。