Need to configure DNS in RHEL5.  Have configured DNS in 192 series ip server and had made 192 series ip as client.
Now need to know how to configure DNS in 192 series ip and 172 series ip as client.

Answer:

In a nutshell, you need to install the latest version of BIND (if you haven't, I assume you have).

Start the service:

Code:
/etc/init.d/named start

Set it to always start on boot:

Code:
chkconfig --levels 2345 named on

You tell named how to run in the configuration file /etc/named.conf, and you also put the information about which zones it will be authoritative for. An example named.conf:

Code:
options {
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
recursion no;
/*
* 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";
};

include "/etc/rndc.key";

zone "mydomain.com" {
type master;
file "/var/named/mydomain.com.db";
};
And then, at /var/named/mydomain.com.db, you have the zone file, which might look like this:
Code:
; Zone File for mydomain.com
$TTL 14400
@ 14440 IN SOA ns1.your-authoritative-NS.com. your.email.address. ( 2006102400
14400
7200
3600000
86400
)

mydomain.com. 14400 IN NS ns1.your-authoritative-NS.com.
mydomain.com. 14400 IN NS ns2.your-other-nameserver.com.

mydomain.com. 14400 IN A 1.2.3.4

mydomain.com. 14400 IN MX 0 mail.mydomain.com.

mail 14400 IN A 1.2.3.4
www 14400 IN CNAME mydomain.com.

There's much, much more. That should get you started, but I highly recommend you give a read to DNS and BIND.

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