DNS Server is the service that used for domain translation server for translate the domain become ip address and vice versa. In this tutorial I’ll discuss about how to DNS server configuration on linux Centos 7. For this article I’ll use ip address 10.100.1.1 for the dns server network 10.100.1.0/24 for client network.
First make sure you have configured network on your server and make sure your server already connected to the internet.
update your system first :
[root@DNSServer ~]# yum update
Install dns server packages :
[root@DNSServer ~]# yum install bind bind-utils -y
Edit the configuration zone at /etc/named.conf
[root@DNSServer ~]# vi /etc/named.conf// // See /usr/share/doc/bind*/sample/ for example named configuration files. // // See the BIND Administrator's Reference Manual (ARM) for details about the // configuration located in /usr/share/doc/bind-{version}/Bv9ARM.html options { listen-on port 53 { 127.0.0.1; 10.100.1.1; }; listen-on-v6 port 53 { ::1; }; directory "/var/named"; dump-file "/var/named/data/cache_dump.db"; statistics-file "/var/named/data/named_stats.txt"; memstatistics-file "/var/named/data/named_mem_stats.txt"; recursing-file "/var/named/data/named.recursing"; secroots-file "/var/named/data/named.secroots"; allow-query { localhost; 10.100.1.0/24; }; allow-transfer { localhost; 10.100.1.0/24; };
Add the forwarding zone configuration and reverse zone configuration in the named.conf at bellow section :
zone "." IN {
type hint;
file "named.ca";
};
zone "taufiknurhuda.com" IN {
type master;
file "/var/named/db.taufiknurhuda";
allow-update { none; };
};
zone "1.100.10.in-addr.arpa" IN {
type master;
file "/var/named/db.100.10";
allow-update { none; };
};
include "/etc/named.rfc1912.zones";
include "/etc/named.root.key";
Edit Forward zone configuration file :
[root@DNSServer ~]# vi /var/named/db.taufiknurhuda
Add the following configuration :
; $TTL 604800 @ IN SOA ns.taufiknurhuda.com. root.taufiknurhuda.com. ( 1 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; @ IN NS ns.taufiknurhuda.com. @ IN A 10.100.1.1 ns IN A 10.100.1.1 www IN A 10.100.1.1 mail IN A 10.100.1.1
Edit Reverse zone configuration file :
[root@DNSServer ~]# vi /var/named/db.100.10
Add the following configuration :
; $TTL 604800 @ IN SOA ns.taufiknurhuda.com. root.taufiknurhuda.com. ( 1 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; ; @ IN NS ns.taufiknurhuda.com. @ IN PTR taufiknurhuda.com. 1 IN PTR ns.taufiknurhuda.com. 1 IN PTR www.taufiknurhuda.com. 1 IN PTR mail.taufiknurhuda.com.
Test the configure named.conf with named-checkconf. If no error message appears, the configuration is success.
[root@DNSServer ~]# named-checkconf
Test the configure zone :
[root@DNSServer ~]# named-checkzone taufiknurhuda.web.id /var/named/db.taufiknurhuda zone taufiknurhuda.web.id/IN: loaded serial 1 OK [root@DNSServer ~]# named-checkzone 10.100.1.1 /var/named/db.100.10 zone 10.100.1.1/IN: loaded serial 1 OK
Add the firewalld configuration for dns service :
[root@DNSServer ~]# firewall-cmd --permanent --add-service=dns success [root@DNSServer ~]# firewall-cmd --reload success
Restart Named service :
[root@DNSServer ~]# systemctl restart named
Configure resolv.conf
[root@DNSServer ~]# vi /etc/resolv.confsearch taufiknurhuda.com nameserver 10.100.1.1 nameserver 8.8.8.8
Then, test the configuration with nslookup :
[root@DNSServer ~]# nslookup taufiknurhuda.com Server: 10.100.1.1 Address: 10.100.1.1#53 Name: taufiknurhuda.com Address: 10.100.1.1 [root@DNSServer ~]# nslookup 10.100.1.1 1.1.100.10.in-addr.arpa name = mail.taufiknurhuda.com. 1.1.100.10.in-addr.arpa name = ns.taufiknurhuda.com. 1.1.100.10.in-addr.arpa name = www.taufiknurhuda.com.
Configuration is successfull.