Configuring DNS Server on Red Hat Enterprise Linux 5(Part-1)

Primary DNS Server Configuration

Step- 1: Check bind and caching-nameserver rpm package is installed or not by following this command:

                       

[root@ns1 ~]# rpm -qa | grep –i bind*    or

[root@ns1 ~]#  rpm –qa bind*            (if installed then it will show all the bind related packages)

bind-chroot-9.3.6-4.P1.el5

bind-libs-9.3.6-4.P1.el5

ypbind-1.19-12.el5

bind-9.3.6-4.P1.el5

bind-utils-9.3.6-4.P1.el5

bind-sdb-9.3.6-4.P1.el5

bind-devel-9.3.6-4.P1.el5

bind-libbind-devel-9.3.6-4.P1.el5

system-config-bind-4.0.3-4.el5

[root@ns1 ~]# rpm -qa caching-nameserver* 

Caching-nameserver-9.3.6-4.P1.el5

            If not installed, then installed the packages using  Yum command:

[root@ns1 ~]# Yum Install bind* caching-nameserver*

Step-2: Check and Configure the Network Card:

[root@ns1 ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0

(Original File):

#Broadcom Corporation Net link BCM57875 Gigabyte Ethernet PCI Express

DEVICE=eth0
BOOTPROTO=dhcp
HWADDR=00:0C:29: EB: B2: CA
ONBOOT=yes

(Modified File):

#Broadcom Corporation Net link BCM57875 Gigabyte Ethernet PCI Express

DEVICE=eth0

BOOTPROTO=static

HWADDR=00:0C:29: EB: B2: CA

ONBOOT=yes

TYPE=Ethernet

PEERDNS=no

USERCTL=no

IPV6INIT=no

IPADDR=210.207.201.1

NETMASK=255.255.255.0

NETWORK=210.207.201.0

BROADCAST=210.207.201.255

After changing you have to reload/restart the NIC(eth0) card by following command:

[root@ns1 ~]# ifdown eth0

[root@ns1 ~]# ifup eth0

[root@ns1 ~]# service network restart

Step-3: After complete the NIC configure you have to change the host name by following this command:

[root@ns1 ~]# vi /etc/sysconfig/network

(Original File):

NETWORKING=yes

NETWORKING_IPV6=no

HOSTNAME=localhost.localdomain

(Modified File):

NETWORKING=yes

NETWORKING_IPV6=no

HOSTNAME=ns1

Step-4: Now Edit hosts file for host name resolution by following this command:

[root@ns1 ~]# vi /etc/hosts

(Original File):

# Do not remove the following line, or various programs

# that require network functionality will fail.

127.0.0.1       localhost.localdomain localhost

(Modified File):

# Do not remove the following line, or various programs

# that require network functionality will fail.

127.0.0.1       localhost.localdomain localhost

210.207.201.1   ns1.alphabd.net      ns1

Step-5: Copy & Rename the named.rfc1912.zones file to named.conf file & Change the ownership & permission by following this command:

[root@ns1 ~]# cd /var/named/chroot/etc/

[root@ns1 etc]# cp named.rfc1912.zones  named.conf

[root@ns1 etc]# chown root:named named.conf

[root@ns1 etc]# chmod 777 named.conf

Now Create A Link into /etc directory of named.conf then edit.

[root@ns1 etc]# ln –s /var/named/chroot/etc/named.conf  /etc/named.conf

[root@ns1 ~]# vi /etc/named.conf

Original File:

// named.rfc1912.zones:

//

// Provided by Red Hat caching-nameserver package

//

// ISC BIND named zone configuration for zones recommended by

// RFC 1912 section 4.1 : localhost TLDs and address zones

//

// See /usr/share/doc/bind*/sample/ for example named configuration files.

//

zone "." IN {

     type hint;

     file "named.ca";

};

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 "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {

        type master;

     file "named.ip6.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; };

};

Modified File:

// named.rfc1912.zones:

//

// Provided by Red Hat caching-nameserver package

//

// ISC BIND named zone configuration for zones recommended by

// RFC 1912 section 4.1 : localhost TLDs and address zones

//

// See /usr/share/doc/bind*/sample/ for example named configuration files.

//

options {

     directory "/var/named";

};

zone "." IN {

     type hint;

     file "named.ca";

};

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 "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {

        type master;

     file "named.ip6.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; };

};

zone "alphabd.net" IN {

     type master;

     file "alphabd.fz";

};

zone "201.207.210.in-addr.arpa" IN {

     type master;

     file "alphabd.rz";

};

Step-6: Copy, rename & change the ownership & permission of  localhost.zone file  for Forward lookup zone.

[root@ns1 ~]# cd /var/named/chroot/var/named/

[root@ns1 named]# cp localhost.zone alphabd.fz

[root@ns1 named]# chown root:named alphabd.fz

[root@ns1 named]# chmod 777 alphabd.fz

[root@ns1 named]# vi alphabd.fz

Original File:  localhost.zone

$TTL 86400

@          IN SOA     @       root (

                           42         ; serial (d. adams)

                           3H         ; refresh

                           15M        ; retry

                           1W         ; expiry

                           1D )       ; minimum

           IN NS @

          IN A       127.0.0.1

           IN AAAA         ::1

Modified File:  alphabd.fz

$TTL 86400

@          IN SOA     ns1.alphabd.net.       root.alphabd.net. (

                           2011022500 ; serial (d. adams)

                           3H         ; refresh

                           15M        ; retry

                           1W         ; expiry

                           1D )       ; minimum

           IN NS     ns1.alphabd.net.

ns1      IN A       210.207.201.1

Step-7: copy & rename the alphabd.fz  file  for Reverse lookup zone.

[root@ns1 named]# cp alphabd.fz alphabd.rz

[root@ns1 named]# vi alphabd.rz

Original File:  alphabd.fz

$TTL 86400

@          IN SOA     ns1.alphabd.net.       root.alphabd.net. (

                           2011022500 ; serial (d. adams)

                           3H         ; refresh

                           15M        ; retry

                           1W         ; expiry

                           1D )       ; minimum

           IN NS     ns1.alphabd.net.

ns1      IN A       210.207.201.1

Modified File:  alphabd.rz

$TTL 86400

@          IN SOA     ns1.alphabd.net.       root.alphabd.net. (

                           2011022500 ; serial (d. adams)

                           3H         ; refresh

                           15M        ; retry

                           1W         ; expiry

                           1D )       ; minimum

           IN NS     ns1.alphabd.net.

1        IN PTR     ns1.alphabd.net.

Step-8:  Edit the resolv.conf file by following this command

[root@ns1 named]# vi /etc/resolv.conf

search alphabd.net

nameserver 210.207.201.1

Step-9:    Check the named.conf & zone file by following this commands,

[root@ns1 ~]# named-checkconf  /var/named/chroot/etc/named.conf 

[root@ns1 ~]# named-checkzone  alphabd.net  /var/named/chroot/var/named/

alphabd.fz

[root@ns1 ~]# named-checkzone  alphabd.net   /var/named/chroot/var/named/

alphabd.rz

Step-10: DNS check

[root@ns1 ~]# service iptables stop

[root@ns1 ~]# service network restart

[root@ns1 ~]# chkconfig named on

[root@ns1 ~]# service named restart/status/start/stop/configtest

[root@ns1 ~]# host 210.207.201.1

[root@ns1 ~]# host ns1.alphabd.net

[root@ns1 ~]# Ping ns1.alphabd.net

[root@ns1 ~]# nslookup ns1.alphabd.net

[root@ns1 ~]# nslookup 210.207.201.1

[root@ns1 ~]# dig ns1.alphabd.net

[root@ns1 ~]# dig –x 210.207.201.1

[root@ns1 ~]# dig –x ns1.alphabd.net

[root@ns1 ~]# dig –t SOA alphabd.net

[root@ns1 ~]# dig –t axfr alphabd.net