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How to Setup DNS Server (Bind9) on Ubuntu 24.04 | Step-by-Step Guide
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Nov 6, 2024
Learn how to set up a powerful DNS server on Ubuntu 24.04 with Bind9, perfect for internal networks and custom domain resolution. This comprehensive step-by-step tutorial covers everything from installation to configuration and testing. ### Steps Covered: **1. Update System Packages** - Ensure your server is up-to-date before installation: sudo apt update && sudo apt upgrade -y **2. Install Bind9** - Install Bind9 along with utilities and documentation: sudo apt install bind9 bind9utils bind9-doc -y **3. Configure Bind9** - Edit the primary configuration file to define access control and DNS settings: sudo vi /etc/bind/named.conf.options - Set up an internal network ACL and configure options such as forwarders, recursion, and query access. acl internal-network {192.168.1.0/24;}; options {
View Video Transcript
0:00
hello everyone welcome back to our
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channel in today's tutorial we will
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cover how to set up a DNS server using
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bind 9 on UB
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24.4 D server plays a crucial role in
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translating domain names into the IP
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address and vice versa and making it
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easier to access websites if you are
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working on a local network or looking to
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host your own DNS then this is the guide
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for you let's dive in and get started
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before we begin let's talk about what B9
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is is it is one of the most widely used
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DNS server applications especially
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popular in Linux environments by
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configuring b n we can manage domain
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name resolution within the network or
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even host your own domains in this
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tutorial I'll be using the followings so
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this is my22 24.4 system where I will be
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installing the bind 9 in order to
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configure the DNS server this is the IP
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address of my system and this will be
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the domain name that I will be using it
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while installing and configuring the DNS
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server and this is the private Network
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on this private Network I have these two
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client machines these client machines
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will be using this DNS server without
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any further delay let's get
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started in the interest of time I have
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already prepared a set of instructions
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and the sample file that I will refer in
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this tutorial I will paste these in the
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description of the video for your
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reference the the first step is to
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update system packages in order to
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install all the available updates on
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your system first we need to run the app
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update and app upgrade
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command I have only taken the SSS
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session of my ub22
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24.4 system let's start updating the
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system
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packages me clear the
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screen run sudu
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next install the bind n package along
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with the additional utilities for the
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configuration for that we'll be running
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this command copy this
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command clear scen
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once all the packages have been
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installed we will move into the
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configuration part all the configuration
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files for the bind are located in the
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folder SL cc/ bind one of the important
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configuration file for the bind is
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name.com do options
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in this file we will Define our private
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Network and we will allow that private
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Network to query to this DNS server
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apart from this we will add the
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forwarders DNS server this will come
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into the picture whenever our local DNS
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server is unable to resolve any query in
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that case local DNS server will forward
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that request to this forwarder genus
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right let's edit this file
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I'll be using the sample file that I
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have already prepared it copy these
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lines I will delete these
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lines and paste the one that I copied
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from the sample this is my private
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Network under allow query I have allowed
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this ACL internal hyper Network work in
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the forwarders I have specified the
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Google DNS
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server all right now save this
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file next important configuration file
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is name.on dolal in this file we will
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Define the Jones for our domain there
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are two type of Zone files reverse Zone
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and the forward Zone in the forward Zone
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files we'll Define the records like NS a
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MX and C name and reverse Zone files we
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usually Define the PTR
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CS all right let's edit this
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file again I will use my sample file so
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copy these lines
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so under the Zone section I have defined
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this is my domain name for this domain
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this is my forwarders Zone file with the
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name forward. linux.org similarly for
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the reverse Zone we need to Define this
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syntax so in make sure you replace the
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domain name and this uh private Network
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according to your setup and this is my
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reverse
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Zone file
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all right save this
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file sample Zone files are already
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located under the EDC bind folder for
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forward Zone you can refer this one and
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for the reverse Zone you can refer this
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file next create our forward Zone
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file copy the content from our sample
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file
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this is the NS record which explain
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about the fqdn for our DNS server in our
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case the fqdn for our name server is
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primary. linux.org and I have defined
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the aord this a record points to our ubu
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24.4
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system I have also defined m MX record
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MX record is used for the mail servers
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so this is keyword MX is your type of
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record 10 is the priority for this
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report it could be a scenario that you
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would be running a
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multiple u m servers in that case we
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this priority come into the picture and
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this is the fqdn of my mail server
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similarly for www uh I am running uh a
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web server on this IP and mail server is
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running on this
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and in the last I had defined a c name
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Rec save this
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file next create a reverse Zone
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file copy the content from the sample
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file in this file we we have PTR course
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p course means it will DNS will resolve
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the IP address into the
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fqdn this is for my name server 50 is
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for my web server and 60 will resolve
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into the my mail
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server save this
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file next uh edit EDC default named file
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we need to add one parameter so that DNS
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service start listening on
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ipv4 in order to implement these changes
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we need to restart our bind service that
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is name d for that run the command sudu
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system
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CTL
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restart MD
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enable the service so that it is
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persistent across the
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reboot now verify the
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status output confirms that named the
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service is up and running in case OS
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firewall is running on your system then
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you need to allow the DNS board that is
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53 for that you can in the command to do
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let me clear the screen
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first there are some utilities that can
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cross verify the syntax of your con file
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and The Jone
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files you want to verify the syntax of
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your con file in that case you can run
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this command Soo space named hyphen
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check conf and the con file that you
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would like to
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validate
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this if there is no output it means the
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syntax wise the file is okay similarly
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you can cross verify your Jone
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files for Jone file there is a utility
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called named Pyon check John
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here okay means syntax wise this file is
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perfect similarly to the validation for
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reverse Zone
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file now our DNS server installation and
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configuration part is completed next
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validate this uh DNS server for that we
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will be moving to the client machine
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machine we'll update the DNS server on
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that machine and we'll run couple of
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test
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cases all right first we need to make
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sure in the res.com file our DNS server
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is specified there can cross
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verify I have already updated this file
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and added our DNS
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server all right now we have a utility
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called dig that can query to our DNS
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server let's try to run the command
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dig and then the fqdn of our name
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server it is
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primary do
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linux.org
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great we are getting the answer from
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this name server let's do a PT a record
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validation for that you can
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use dig hyon X and then the IP address
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of your DNS
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server great this is pointing to this
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fqdn means PT code is also working fine
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and let's look up let's say I want to
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have the record of my web server
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linux.org
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for this fqdn ww linux.org this is the
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IP address
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of web server similarly we can cross
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verify the record for our mail server
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that's all from this video tutorial I
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hope you have found it useful and
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informative please do like the video
12:38
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12:47
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