In this tutorial I’ll discuss about how to configuration dns server on ubuntu server 20.04 LTS. DNS are used for translate ip address to domain and vice versa.
Fist For configuration dns server change ip address configuration. Open netplan configuration.
root@Taufik:~# nano /etc/netplan/00-installer-config.yaml
Configure dns on nameservers. Set ip dns is address of those server at first so that dns reading will be request to local dns server first.
# This is the network config written by 'subiquity' network: ethernets: enp0s3: addresses: [10.202.0.30/27] gateway4: 10.202.0.1 nameservers: addresses: [10.202.0.30, 10.202.0.1] version: 2
Change ip address configuration :
root@Taufik:~# netplan apply
Configure resolv.conf
root@Taufik:~# nano /etc/resolv.conf
Add configuration as the following :
GNU nano 4.8 /etc/resolv.conf # This file is managed by man:systemd-resolved(8). Do not edit. # # See man:systemd-resolved.service(8) for details about the supported modes of # operation for /etc/resolv.conf. nameserver 10.202.0.30
Configure Host :
root@Taufik:~# nano /etc/hosts
Change host configuration as the following :
127.0.0.1 localhost 127.0.1.1 taufiknurhuda.com 10.202.0.30 taufiknurhuda.com # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters
Update system :
root@Taufik:~# apt-get update
Install dependency packages :
root@Taufik:~# apt-get install libxml2 libicu66 -y
Install BIND9 packages for dns server service :
root@Taufik:~# apt-get install bind9 -y
Configure dns zone :
root@Taufik:~# nano /etc/bind/named.conf.local
Add the configuration as the following. see at zone 0.202.10, it’s the network for server ip 10.202.0.30 written in reverse.
//
// Do any local configuration here
//
// Consider adding the 1918 zones here, if they are not used in your
// organization
//include "/etc/bind/zones.rfc1918";
zone "taufiknurhuda.com" {
type master;
file "/etc/bind/db.domain";
};
zone "0.202.10.in-addr.arpa" {
type master;
file "/etc/bind/db.ip";
};
Change directory to /etc/bind :
root@Taufik:~# cd /etc/bind/ root@Taufik:/etc/bind#
Copy default db file configuration to new db file. db.local to db.domain and db.127 to db.ip.
root@Taufik:/etc/bind# cp db.local db.domain root@Taufik:/etc/bind# cp db.127 db.ip root@Taufik:/etc/bind#
Configure db.domain :
root@Taufik:/etc/bind# nano db.domain
Do configuration as the following :
; ; BIND data file for local loopback interface ; $TTL 604800 @ IN SOA taufiknurhuda.com. root.taufiknurhuda.com. ( 2 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; @ IN NS ns.taufiknurhuda.com. ns IN A 10.202.0.30 @ IN A 10.202.0.30 www IN A 10.202.0.30
save and exit.
Configure db.ip :
root@Taufik:/etc/bind# nano db.ip
Do configuration as the following. 30 is the host id that used on server ip 10.202.0.30 :
; ; BIND data file for local loopback interface ; $TTL 604800 @ IN SOA taufiknurhuda.com. root.taufiknurhuda.com. ( 1 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; @ IN NS ns.taufiknurhuda.com. 30 IN PTR taufiknurhuda.com. 30 IN PTR www.taufiknurhuda.com.
save and exit.
Restart bind9 service :
root@Taufik:~# systemctl restart bind9.service
Test the configuration using nslookup :
root@Taufik:~# nslookup taufiknurhuda.com Server: 10.202.0.30 Address: 10.202.0.30#53 Name: taufiknurhuda.com Address: 10.202.0.30 root@Taufik:~#
root@Taufik:~# nslookup www.taufiknurhuda.com Server: 10.202.0.30 Address: 10.202.0.30#53 Name: www.taufiknurhuda.com Address: 10.202.0.30
root@Taufik:~# nslookup 10.202.0.30 30.0.202.10.in-addr.arpa name = www.taufiknurhuda.com. 30.0.202.10.in-addr.arpa name = taufiknurhuda.com. 30.0.202.10.in-addr.arpa name = ns.taufiknurhuda.com. root@Taufik:~#
As the shown above, if nslookup test is pointed to local ip server. Dns configuration is successfull.