This document provides instructions for configuring a DNS server with static IP addressing and domain name resolution. It describes installing and configuring the bind package to enable DNS services, editing configuration files like named.conf and zone files, and testing the DNS server setup using commands like dig and nslookup. The DNS server is configured to resolve hostnames for the example.com domain and provide forward and reverse lookups once the named service is restarted.

1. DNS SERVER ORPRIMARYDNS

2. DNS Configuration
1. DNS Server MininumRequirement :
 Staic IP address .
 Fully QualifiedDomain Name(FQDN) .
2. DNS = DomainName Server
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3. 8/7/2018 MOHSIN HASAN
1.Static IP address configuration
#vim /etc/sysconfig/network-script/ifcfg-ens33
# systemctl restart network //restart network
# systemctl enable network //enable network

4. Configure DNS
PackageName= bind(breaklyinternet named domain)
ServiceName =named . Port =53 .
Server Name=DNS(Domain NameServer)
ConfigFile :
 /etc/hostname
 /etc/hosts
 /etc/named.conf
 /etc/named.rfc1912.zones
Zone FileDirectory : /var/named
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5. DNS of Two Zone That there are:
 Forward zone File = named.localhost
 Reverse Zone File = named.loopback
Functions Of DNS:
 Forward Lookup = Hostname To IP
 Reverse lookup = IPTo Hostname
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6. SET HOSTNAME
# hostnamectl set-hostname dns.mmc.com
# hostname //check
OR
# vim /etc/hostname
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7. HOSTNAME
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• dns.mmc.com //hostname
dns = host mmc = domain
. = root domain com = Organizational TLD
bd = Country Level TLD( top level domain)

8. Checking and installing Packages :
# rpm –qa | grep bind //check bind packages
# yum install bind* -y //install bind packages
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Config & EditHOSTS File
# vim/etc/hosts //edit hosts file
192.168.10.2 dns.example.com dns //edit this linein last
OR

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Config& Editnamed.conf File
#vim /etc/named.conf //edit named.conf file
Listen-on port 53 { any; } //any means any ip
Allow-quary { any; } //any oran IP block ip/24
OR

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Config& Edit named.rfc1912.zones File
#cp /etc/named.rfc1912.zones /etc/named.rfc1912.zones.back //backup zonefile
# vim/etc/named.rfc1912.zones //edit zonefile add
zone"example.com" IN{
type master;
file "forward.zone";
allow-update { none;};
};
zone "10.168.192.in-addr.arpa"IN{
type master;
file "reverse.zone";
allow-update { none;};
};
OR

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# vimforward.zone
$TTL1D
@ INSOA dns.example.com.mohsin.gmail.com.(
0 ; serial
1D ;refresh
1H ;retry
1W ;expire
3H) ;minimum
IN NS dns.example.com.
IN A 192.168.10.16
dns IN A 192.168.10.16
OR
# cd /var/named //switch to /var/nameddirectory
# cp named.localhost forward.zone //copy namedfile as forward.zone
# cp named.loopback reverse.zone //copy namedfile as reverse.zone
Configureforwardzone File

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Configure reverse zone File
# vim reverse.zone
$TTL 1D
@ IN SOA dns.example.com.mohsin.gmail.com. (
0 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H) ; minimum
IN NS dns.example.com.
IN A 192.168.10.16
16 IN PTR dns.example.com.
OR
#chgrp named forward.zone //changegroup to named
# chgrpnamed reverse.zone //changegroup to named

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# vim /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=dns.example.com
OR
Configuring network file :

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# dig dns.example.com //check dns server
# dig –x 192.168.10.16 //check dns reves look-up
# nslookup //check dns server
OR
# systemctl restart named //restart namedservice
# systemctl enable named //enable namedservice
# systemct restart network //restart network service
# firewall-cmd --permanent --add-service=dns //alow firewall
# firewall-cmd --reload //reload firewall

16. QUESTIONS?
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17. THANK YOU
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