Installing DNS server on CentOS 5

In the first time, you must download core software of this service, that are

1. bind


2. caching-nameserver


3. bind-chroot

You can download this software by this command,

# yum -y install bind caching-nameserver bind-chroot

After you downloaded , you can setup follow this instruction :

1. Check your hostname by this command :

# uname -n
dns.aoddy.com

2. Edit /etc/named.conf

options {
directory “/var/named”;
forwarders {WWW.XXX.YYY.ZZZ;}; // IP of ISP // query-source address * port 53;
allow-query { localhost; 192.168.0.0/24;};
// query range
allow-transfer { localhost; 192.168.0.0/24;};
// transfer range
allow-recursion { localhost; 192.168.0.0/24;};
// recursion range
};controls {
inet 127.0.0.1 allow { localhost; } keys { rndckey; };
};// here is the section for internal informationsview “internal” {
match-clients {
localhost;
192.168.0.0/24;
}; zone “.” IN {
type hint;
file “named.ca”;
}; zone “mysite.com” IN {
// for common resolving
type master;
file “mysite.com.fwd”;
allow-update { none; };
}; zone “0.168.192.in-addr.arpa” IN {
// for reverse resolving *note
type master;
file “mysite.com.rev”;
allow-update { none; };
}; zone “localdomain” IN {
type master;
file “localdomain.zone”;
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; };
};

zone “255.in-addr.arpa” IN {
type master;
file “named.broadcast”;
allow-update { none; };
};

zone “0.in-addr.arpa” IN {
type master;
file “named.zero”;
allow-update { none; };
};

};

// here is the section for external informations
view “external” {
match-clients {
any;
};

zone “.” IN {
type hint;
file “named.ca”;
};

zone “server-linux.info” IN {
// for common resolvin
type master;
file “server-linux.info.wan”;
allow-update { none; };

};

zone “80.0.16.172.in-addr.arpa” IN {
// for reverse resolving *note
type master;
file “80.0.16.172.db”;
allow-update { none; };
};
};
include “/etc/rndc.key”;

2. Create /var/named/mysite.com.fwd

$TTL 86400
@ IN SOA dns.mysite.com. root.aoddy.com.(
1997022700 ; Serial
28800 ; Refresh
14400 ; Retry
3600000 ; Expire
86400 ) ; Minimum
IN NS dns.mysite.com.
IN MX 10 dns.mysite.com.
IN MX 20 web.mysite.com.
IN A 192.168.0.2
dns IN A 192.168.0.2
web IN A 192.168.0.3

3. Create file /var/named/aoddy.com.rev

$TTL 86400
@ IN SOA dns.aoddy.com. root.mysite.com.(
1997022700 ; Serial
28800 ; Refresh
14400 ; Retry
3600000 ; Expire
86400 ) ; Minimum
IN NS dns.aoddy.com.
IN MX 10 dns.mysite.com.
IN MX 20 web.mysite.com
IN PTR dns.mysite.com.
2 IN PTR dns.mysite.com.
3 IN PTR web.mysite.com.

4. Start service

# service named restart

5. Test this server can resolve domain&ip

[root@dns named]# nslookup
> dns.mysite.com
Server: 192.168.0.2
Address: 192.168.0.2#53Name: dns.mysite.com
Address: 192.168.0.2> 192.168.0.2
Server: 192.168.0.2
Address: 192.168.0.2#53

2.0.168.192.in-addr.arpa name = dns.mysite.com.
>

6. If your service can’t resolve , you can check on your file config by this command :

# named-checkconf