配置 DNS 辅助域名服务器和子域名服务器
一、规划说明：
主机A: 双网卡
192.168.1.7 --> mydomain.org主域名服务器
192.168.10.7 --> myzone.org主域名服务器，其有两个子域，为market.myzone.org和develog.myzone.org
主机B：双网卡
192.168.1.6 --> mydomain.org辅助域名服务器
192.168.10.6 --> market.myzone.org子域名服务器
两台服务器均有DNS独立的日志，用以记录查询（query_logs）记录和错误（err_logs）记录，以便于DNS后期管理；本文不过多涉及安全方面的问题。
安装过程请参照另一篇文章“Bind 9.4.0rc2安装笔记（一步步学习配置简易DNS）”。
二、主机A：
1. 主配置文件/etc/named.conf
options {
directory "/var/named/";
version "0.0.0";
};
logging {
channel dns_errors
{ file "/var/log/named/err_logs" versions 3 size 10m;
severity error;
print-category yes;
print-severity yes;
print-time yes;
};
channel dns_queries
{ file "/var/log/named/query_logs" versions 3 size 10m;
severity info;
print-category yes;
print-severity yes;
print-time yes;
};
category default { dns_errors; };
category queries { dns_queries; };
};
zone "." {
type hint;
file "named.ca";
};
zone "localhost" {
type master;
file "named.local";
};
zone "0.0.127.IN-addr.arpa" {
type master;
file "named.rev";
};
zone "mydomain.org" {
type master;
file "mydomain.org.zone";
allow-transfer { 192.168.1.6/32; };
};
zone "myzone.org" {
type master;
file "myzone.org.zone";
allow-transfer { 192.168.10.0/24; };
};
zone "10.168.192.in-addr.arpa" {
type master;
file "192.168.10.zone";
allow-transfer { 192.168.10.0/24; };
};
zone "1.168.192.in-addr.arpa" {
type master;
file "192.168.1.zone";
allow-transfer { 192.168.1.6/32; };
};
key "rndc-key" {
algorithm hmac-md5;
secret "oKLRLl8BolNj883OX1YcxQ==";
};
controls {
inet 127.0.0.1 port 953
allow { 127.0.0.1; } keys { "rndc-key"; };
};
# End of named.conf
2.域mydomain.org的正向解析文件/var/named/mydomain.org.zone
$TTL 1D
$ORIGIN mydomain.org.
@ 1D IN SOA mydomain.org. root.mail.mydomain.org. (
20070301
1H
15M
1W
1D )
IN NS ns.mydomain.org.
IN MX 10 mail.mydomain.org.
mydomain.org. IN A 192.168.1.7 #泛域名解析
ns IN A 192.168.1.7
mail IN A 192.168.1.100
www IN CNAME mail
ftp IN CNAME mail
3.域mydomain.org的反向解析文件/var/named/192.168.1.zone
$TTL 1D
@ 1D IN SOA mydomain.org. root.mail.mydomain.org. (
20070301
1H
15M
1W
1D )
IN NS ns.mydomain.org.
7 IN PTR marion.org.
7 IN PTR ns.mydomain.org.
100 IN PTR mail.mydomain.org.
4.域myzone.org的正向解析文件/var/named/myzone.org.zone
# more /var/named/myzone.org.zone
$TTL 1D
$ORIGIN myzone.org.
@ 1D IN SOA myzone.org. root.mail.myzone.org. (
20070301
1H
15M
1W
1D )
IN NS ns.myzone.org.
IN MX 10 mail.myzone.org.
myzone.org. IN A 192.168.10.7
ns IN A 192.168.10.7
mail IN A 192.168.10.5
www IN CNAME mail
ftp IN CNAME mail
market IN NS ns.market #指明授权的子域market
ns.market IN A 192.168.10.6
$ORIGIN develop.myzone.org. #指明授权的子域develop,和上一种方法稍有不同.
IN NS ns.develop.myzone.org.
ns IN A 192.168.10.2
5.域myzone.org的反向解析文件/var/named/192.168.10.zone
$TTL 1D
@ 1D IN SOA myzone.org. root.mail.myzone.org. (
20070301
1H
15M
1W
1D )
IN NS ns.myzone.org.
6 IN PTR ns.market.myzone.org
2 IN PTR ns.develop.myzone.org
7 IN PTR ns.myzone.org.
5 IN PTR mail.myzone.org.
7 IN PTR myzone.org.
三、主机B:
1.named主配置文件/etc/named.conf
options {
directory "/var/named/";
version "unknown";
forwarders { 192.168.1.7; };
};
logging {
channel dns_errors
{ file "/var/log/named/err_logs" versions 3 size 10m;
severity error;
print-category yes;
print-severity yes;
print-time yes;
};
channel dns_queries
{ file "/var/log/named/query_logs" versions 3 size 10m;
severity info;
print-category yes;
print-severity yes;
print-time yes;
};
category default { dns_errors; };
category queries { dns_queries; };
};
zone "." {
type hint;
file "named.ca";
};
zone "localhost" {
type master;
file "named.local";
};
zone "0.0.127.IN-addr.arpa" {
type master;
file "named.rev";
};
zone "mydomain.org" {
type slave;
file "mydomain.org.zone";
masters { 192.168.1.7; };
};
zone "1.168.192.in-addr.arpa" {
type slave;
file "192.168.1.zone";
masters { 192.168.1.7; };
};
zone "market.myzone.org" {
type master;
file "market.myzone.org.zone";
};
zone "10.168.192.in-addr.arpa" {
type master;
file "192.168.10.zone";
};
key "rndc-key" {
algorithm hmac-md5;
secret "NiBZCqWP0IsvMPuZpUKdog==";
};
controls {
inet 127.0.0.1 port 953
allow { 127.0.0.1; } keys { "rndc-key"; };
};
# End of named.conf
2.子域market.myzone.org的正向解析文件/var/named/market.myzone.org.zone
$TTL 1D
$ORIGIN market.myzone.org.
@ 1D IN SOA market.myzone.org. root.mail.market.myzone.org. (
20070301
1H
15M
1W
1D )
IN NS ns.market.myzone.org.
IN MX 10 mail.market.myzone.org.
market.myzone.org. IN A 192.168.10.6
ns IN A 192.168.10.6
mail IN A 192.168.10.100
www IN CNAME mail
3.子域market.myzone.org的反向解析文件/var/named/192.168.10.zone
$TTL 1D
@ 1D IN SOA myzone.org. root.mail.myzone.org. (
20070301
1H
15M
1W
1D )
IN NS ns.myzone.org.
6 IN PTR ns.myzone.org.
100 IN PTR mail.myzone.org.
注:辅助域的解析文件将会由区域传送获得，不需要手动建立。如果你想要反复尝试区域传送的效果，请将TTL值改小。本机的如下所示:
4.域mydomain.org的正向解析文件/var/named/mydomain.org.zone
$ORIGIN .
$TTL 86400 ; 1 day
mydomain.org IN SOA mydomain.org. root.mail.mydomain.org. (
20070301 ; serial
3600 ; refresh (1 hour)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minimum (1 day)
)
NS ns.mydomain.org.
A 192.168.1.7
MX 10 mail.mydomain.org.
$ORIGIN mydomain.org.
ftp CNAME mail
mail A 192.168.1.100
ns A 192.168.1.7
www CNAME mail
5.域mydomain.org的反向解析文件/var/named/192.168.1.zone
$ORIGIN .
$TTL 86400 ; 1 day
1.168.192.in-addr.arpa IN SOA mydomain.org. root.mail.mydomain.org. (
20070301 ; serial
3600 ; refresh (1 hour)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minimum (1 day)
)
NS ns.mydomain.org.
$ORIGIN 1.168.192.in-addr.arpa.
100 PTR mail.mydomain.org.
7 PTR marion.org.
PTR ns.mydomain.org.
四：测试结果
1.主机A：
#nslookup
> set type=NS
> market.myzone.org
Server: 127.0.0.1
Address: 127.0.0.1#53
Non-authoritative answer:
market.myzone.org nameserver = ns.market.myzone.org.
Authoritative answers can be found from:
ns.market.myzone.org internet address = 192.168.10.6
> myzone.org
Server: 127.0.0.1
Address: 127.0.0.1#53
myzone.org nameserver = ns.myzone.org.
> mydomain.org
Server: 127.0.0.1
Address: 127.0.0.1#53
mydomain.org nameserver = ns.mydomain.org.
>
2.主机B：
#nslookup
> set type=NS
> mydomain.org
Server: 127.0.0.1
Address: 127.0.0.1#53
mydomain.org nameserver = ns.mydomain.org.
> myzone.org
Server: 127.0.0.1
Address: 127.0.0.1#53
Non-authoritative answer:
myzone.org nameserver = ns.myzone.org.
Authoritative answers can be found from:
ns.myzone.org internet address = 192.168.10.7
> market.myzone.org
Server: 127.0.0.1
Address: 127.0.0.1#53
market.myzone.org nameserver = ns.market.myzone.org.
