Step-by-Step configurationo f DNS in RHEL 5.0

check your resolve.conf file 

check your hosts file 

after changing this file to restart your network service 

1. install bind all package

2. install caching-nameserver

3. cd /var/named/chroot/etc

4. cp named.caching-nameserver.conf named.conf

5. vim named.conf

after open named.conf file change listen port

allow quary

forwarders 

forward only

6. append named.rfc1912.zones to named.conf

command is 

7. cat named.rfc1912.zones >> named.conf

8. after this file append open named.conf file

9. creat forward zone and reverce zone

//Forward Lookup Zone

zone "example.com" {

      type master;

      file "example.com.zone";

};

##############################################################

//Reverse Lookup Zone

zone "0.168.192.in-addr.arpa" {

      type master;

      file "192.168.0.zone";

};

10. after this step plaese see your iptables 

 

if iptables is show rules so flus this iptables or add rules allow 53 port

10. now create master dns file , forward and reverce

11. cd /var/named/chroot/var/named/

12. copy localdomain.zone file to example.com.zone file  command is

13. cp localdomain.zone example.com.zone

14. after copy this file edit this file as bellow 

$TTL    86400

example.com.            IN SOA  station19.example.com. root.station19.example.com. (

                                        42              ; serial (d. adams)

                                        3H              ; refresh

                                        15M             ; retry

                                        1W              ; expiry

                                        1D )            ; minimum

                IN NS           station19.example.com.

station9.example.com.  IN A            192.168.0.9

15. after this file edit user for command 

16. for i in {1..254}; do echo "station$i.example.com.   IN  A  192.168.0.$i"; done and see this command is ok  now this command append to example.com.zone file , command is 

17. for i in {1..254}; do echo "station$i.example.com.   IN  A  192.168.0.$i"; done >> example.com.zone

18. copy named.ca to 192.168.0.zone file the command is 

19. cp named.ca 192.168.0.zone after this command open 192.168.0.zone file and edit as bellow

20.

$TTL    86400

0.168.192.IN-ADDR.ARPA.       IN      SOA     station19.example.com. root.station19.example.com.  (

                                      1997022700 ; Serial

                                      28800      ; Refresh

                                      14400      ; Retry

                                      3600000    ; Expire

                                      86400 )    ; Minimum

        IN      NS      station19.example.com.

1       IN      PTR     station19.example.com.

after this edit use for command the command is 

21. for i in {1..254}; do echo "$i IN PTR station$i.example.com."; done 

22. afer this command is work is ok then appen this command to 192.168.0.zone file 

23. for i in {1..254}; do echo "$i IN PTR station$i.example.com."; done >> 192.168.0.zone

24. now your named service restart 

25. dig station19.example.com to see forward zone 

26. dig -x 192.168.0.19 to see reverce zone 

if dig command is work then your DNS configration is Ok

Thanks,

Rambilas Varma